Cabarrus County Schools / District Homepage · Web viewA student applies a 10 N force to a wood block with a mass of 5 kg. The block is pushed across four different surfaces. The

Physics Review 7.P.1 [1066087]StudentClassDate

1. The car is described as traveling east at 30 km/h.

From which reference point in the diagram is the motion of the car most likely being described?

A. 1

B. 2

C. 3

D. 4

2. Alex is writing down notes as he watches his friend Carla in a bicycle race. He makes the

following notes.

Physics Review 7.P.1 Page 1/270

Which notes show that Carla’s bicycle is in motion?

A. 1, 2, and 5

B. 1, 2, and 3

C. 2, 3, and 5

D. 2, 3, and 4

3. Isaac Newton discovered the three laws of motion. Which example best illustrates

Newton’s third law of motion, which describes action and reaction forces?

A. a rocket takes off from the ground

B. a book slides forward on a seat when the car stops

C. a heavier ball falls at the same speed as a lighter ball

D. a vehicle rounds a curve and changes its acceleration

4. A skateboarder runs for a few steps and then jumps on his skateboard. His initial applied

energy carries him across a level surface for about 30 seconds. The skater notices that he has skated a long time without ever having to push off the ground again.


What allows the skateboarder to move so long without pushing?

A. Gravity does not act on the skater and

board.

B. The texture of the skating surface is very

rough.

C. Momentum increases as the length of time

increases.

D. There is little friction between wheels and surface.

5. A ball on a cart is moving at a rate of 2 m/s. The cart suddenly stops and the ball

continues to travel in the same direction at the same speed. This is an example of the

A. law of gravity.


B. first law of motion.

C. second law of motion.

D. third law of motion.

6. When riding a roller coaster, an electric motor pulls the roller coaster to the top of the first

hill. What force pulls the roller coaster down the hill?

A. friction

B. speed

C. gravity

D. mass

7. Which statement best describes the motion of an object that is being subjected to two

forces of equal magnitude in opposite directions?

A. The object is accelerating in the direction of the

motion.

B. The object is at rest or moving at a constant velocity.

C. The object is accelerating at a rate that depends on the magnitude of the forces.

D. The object starts from rest and then begins to move at a constant

velocity.

8. During class the teacher showed an enlarged image of a small piece of sidewalk. The

students saw that the sidewalk was rougher than they had previously thought.


Which effect would the rough surface have on a box that is pulled along the sidewalk?

A. It would reduce the amount of work that is performed when pulling the box.

B. It would oppose the force that is being applied to the box when it is pulled.

C. It would decrease the resistance between the forces that are pulling the

box.

D. It would help reduce the force of gravity when the box is pulled.

9. When the two forces are applied to the moving bus, the bus

will

A. come to a complete stop because of unbalanced forces.

B. accelerate because of unbalanced forces.


C. slow down because the forces are balanced.

D. move at a constant speed because the forces are balanced.

10.

Use the diagram to answer the question that follows.

Two forces act on the block of wood as shown. In which direction will the block move?

A.

B.

C.

D.

11. Dennis conducted an investigation on the effect of friction on a toy car. Dennis had a

ramp that he moved onto four different surfaces. During each trial, he rolled the toy car down the ramp and measured the distance the car traveled from the bottom of the ramp. He repeated the investigation three times on each surface. His data are shown in the table.

Toy Car Rolling Distance Surface Distance

(cm)


Trial 1 Trial 2 Trial 3

Wood 18 20 18

Blacktop 16 15 15

Gravel 10 10 8

Sand 8 7 6

Based on Dennis’s results, what should he conclude?

A. The toy car rolled farther on gravel than on sand

B. The toy car rolled the greatest distance on wood.

C. The toy car rolled the shortest distance on gravel.

D. The toy car rolled farther on sand than on blacktop.

12. Which statement best explains why a car that is rolling on a level surface will eventually

come to a stop?

A. Frictional forces oppose the motion of the car.

B. Forward motion slowly runs out as energy is

expended.

C. The natural state of an object is to be at rest.

D. Inertia acting on an object will dissipate.

13. Two forces are applied to a wooden box as shown below.


Which statement best describes the effect these forces have on the box?

A. The box does not

move.

B. The box moves to the right.

C. The box moves to the left.

D. The box moves straight up.

14. Brandon pushes an object on a ramp as shown in the diagram.

While Brandon pushes the object and it remains in contact with the ramp, which force has the greatest effect on causing it to slow?

A. the applied force

B. a frictional force

C. the force due to gravity

D. a force of air resistance


15. Marisa and Dakota were investigating air friction. Marisa dropped a ball, a pen, a

sweatshirt, and a flat sheet of paper from the same height. Dakota recorded the amount of time it took each object to reach the ground. Which object most likely took the longest amount of time to reach the ground?

A. the pen

B. the ball

C. the sweatshirt

D. the sheet of paper

16. In a billiards game, the white cue ball hits the black ball, moving the black ball to the right

while the cue ball moves to the left.

If the action force is applied by the cue ball to the black ball, which force is the reaction force?

A. the force of gravity on the cue ball


B. the friction applied by the table to the

cue ball

C. the force applied to the black ball by the cue

ball

D. the force applied by the stick to the cue

ball

17. A student applies a 10 N force to a wood block with a mass of 5 kg. The block is pushed

across four different surfaces. The accelerations of the block are recorded.

Block Acceleration Data

Surface Acceleration(in meters per

second squared)

1 1.6

2 1.4

3 1.8

4 1.3

Which can be concluded from the information in the table?

A. The block moved for the longest time over Surface 3.

B. The block showed the least friction on Surface 3.

C. The block had the greatest weight on Surface 4.

D. The block had the largest inertia on Surface

4.

18. The box is being pushed to the right with a force of 300 newtons, and to the left with a

force of 400 newtons.


Which is the net force on the box?

A. 300 newtons

B. 400 newtons

C. 700 newtons

D. 100 newtons

19. A 60-kg man and a 25-kg boy, both on roller skates, push off of each other using their

hands. Which of these describes the motion of the two people?

A. The man moves farther and faster than the

boy.

B. The boy moves farther and faster than the

man.

C. The man moves farther but the same speed as the boy.

D. The boy moves faster but the same distance as the man.

20.

A cart accelerates at a rate of 5.0 when acted on by a net force of 25 N. What is the magnitude of the acceleration of the cart when acted on by a force of 75 N to the east and 35 N to the west at the same time?


A.

7.0

B.

8.0

C.

15

D.

22

21. A student reads his paper on friction to the class. Which statement should he include in

his paper if he wants to present accurate information?

A. Friction increases mechanical advantage.

B. Friction opposes the direction of movement.

C. Friction makes movement of an object easier.

D. Friction reduces the amount of work used to move an

object.

22. In the diagrams the arrows represent forces exerted on the boxes. Which diagram

represents a box that will remain stationary?

A.


B.

C.

D.

23.

An object is being subjected to four forces as shown.

What is the magnitude of the net force acting on the object?

A. x


B. 2

x

C. 3

x

D. 9

x

24. Two people are pushing a car. One person is pushing with a force of 450 N and the other

person is pushing with a force of 300 N. What information is needed to determine the net force applied to the car by the people?

A. the direction of the road

B. the direction of the

forces

C. the weight of the two people

D. the weight of the

automobile

25. The best example of balanced forces is a

A. car increasing speed.

B. bus parked in a garage.

C. ball kicked along a flat

surface.

D. roller coaster slowing down on an

incline.


26. Two girls are pulling on opposite ends of a thick rope. Both girls pull on the rope with the

same force but in opposite directions. If both girls continue to pull with the same force, what will most likely happen?

A. One girl will pull the other toward her.

B. Both girls will stay in the same place.

C. Gravity will cause the rope to sag.

D. The rope will break.

27.

The drawing shows a cup on a table.

Which statement best describes the relationship between the cup and the table?

A. The cup is accelerating faster than the table.

B. The cup is pushing on the table.

C. The cup is doing work on the table.

D. The forces on the cup are

unbalanced.

28. A student pushed a toy truck on a flat surface that was 10 meters long. At the end of the


surface was a wall. The first time he pushed the toy truck, it traveled 4 meters.

How far would the toy truck travel if friction was eliminated?

A. the total distance of the flat surface

B. less than the original

distance

C. twice the original distance

D. the same distance

29. A student measures the acceleration of a stone block on a level surface when the block is

acted upon by a known force. What additional information is needed to precisely calculate the block’s mass?

A. the block’s density

B. the amount of friction

C. the mass of the surface

D. the direction of motion

30. A student pushes a shopping cart filled with groceries. The cart has a mass of

12 kilograms (kg). The student pushes the cart with a force of 15 newtons (N). Assuming the ground is frictionless, how fast will the cart accelerate until the student stops applying the force?


A.

B.

C.

D.

31. Which sentence could not explain why the first place swimmer was faster than the second

place swimmer?

A. The winner experienced less water resistance.

B. There was more gravitational pull on the

winner.

C. Friction slowed down the second place swimmer.

D. There was more force in the winner’s kicks and strokes.

32. A boat is acted on by a river current flowing north and by wind blowing on its sails. The

boat travels northeast. In which direction is the wind most likely applying force to the sails of the boat?

A. west

B. east

C. north

D. south

33. A brick is resting on a level, smooth surface. When a student applies a horizontal force of


5 N to the brick, the force of friction on the brick is also 5 N. Which statement best describes the effect of these two forces on the brick?

A. The net force on the brick is 0 N, and the brick begins to move.

B. The net force on the brick is 0 N, and the brick remains at

rest.

C. The net force on the brick is 10 N, and the brick begins to

move.

D. The net force on the brick is 10 N, and the brick remains at rest.

34. Angela blows air into a balloon and holds the end of it closed with her fingers. When she

lets go of the end of the balloon, Angela observes that the release of the air propels the balloon.

The propelling of the balloon from the release of the air is an example of which of Newton’s laws?

A. For every action, there is an equal and opposite reaction.

B. A force of attraction exists between any two objects with mass.

C. The force of an object is the product of its mass multiplied by its

acceleration.

D. An object in motion tends to stay in motion unless an unbalanced force acts upon it.

35. At Time 1, a force of F1 is applied to the left side of a block. The block moves to the right

with a constant acceleration. Then at Time 2, a smaller force, F2, is applied to the right side of the block while F1 is still being applied.


What will most likely happen to the block at Time 2?

A. It will stop completely.

B. It will begin to accelerate to the left.

C. It will accelerate to the right at a faster

rate.

D. It will continue to accelerate to the right at a slower rate.

36.

The illustration shows the relative motion of an airplane wing and the air around it.

What is the best explanation for why the wing is curved on top?

A. to decrease downward pressure of air above the wing

B. to increase downward pressure of air above the

wing


C. to decrease downward pressure of air below the wing

D. to increase downward pressure of air below the wing

37. When a space shuttle orbits Earth and returns home, a force opposes its motion. What is

the source of the opposing force?

A. friction from the atmosphere

B. the velocity of the shuttle

C. the mass of the shuttle

D. gravity from Earth

38. A boat moves forward through water with a force of 5,100 newtons (N). The water resists

with forces equaling 4,800 N. What is the net force acting on the boat?

A. 300 N

B. 4,800 N

C. 5,100 N

D. 9,900 N

39.

Which mass is undergoing the greatest amount of acceleration?

A. 1 kg subjected to a force of 1 N

B. 1 kg subjected to a force of 100 N


C. 100 kg subjected to a force of 1 N

D. 100 kg subjected to a force of 100

N

40. The diagram shows three forces being applied to a crate on a floor.

If the crate is to remain stationary, what amount of force must be applied for z?

A. 800 N

B. 1200 N

C. 2000 N

D. 2400 N

41. A soccer ball is placed at the center of the soccer field.


If a strong wind is blowing from the west to the east, in which numbered direction should a player kick the soccer ball in order to have the best chances of making it into one of the goals?

A. 1

B. 2

C. 3

D. 4

42. When the roller coaster rolls onto a flat section of track, what force would ultimately bring

it to a stop if no other forces are added?

A. gravity


B. weight

C. friction

D. acceleration

43. The diagram shows two fans blowing air on a ball.

What is the net force acting on the ball?

A.

B.

C.

D.

44. A ball rolls across the floor and slows down to a stop. Which force caused the ball to slow

down?

A. friction

B. gravity


C. magnetic

D. inertia

45. Two students are pushing a sofa across a room.

What is the net force applied to the sofa by the students?

A. 150 N

B. 200 N

C. 250 N

D. 400 N

46. The diagram shows two force vectors.

Which statement best describes the vectors?

A. The vectors are pulling in opposite directions.

B. The force vectors will represent balanced forces.


C. The magnitudes of the force vectors are the same.

D. The net force of these vectors will be unbalanced.

47. The following diagrams show various forces acting on a car.

• The car in Diagram 1 is moving. Using the appropriate term balanced or unbalanced, explain what will happen to the car when the forces are applied as shown.

• The car in Diagram 2 is at rest. Using the appropriate term balanced or unbalanced, explain what will happen to the car when the forces are applied as shown.

• The car in Diagram 3 is at rest. Using the appropriate term balanced or unbalanced, explain what will happen to the car when the forces are applied as shown.

• Identify what would be needed in order to balance the force in Diagram 4.

48. During a collision, a seat belt slows the speed of a crash dummy. What is the direction of

the net force exerted by the seat belt compared to the direction of the crash dummy’s motion?


A. in the same direction

B. in a vertical direction

C. in a downward direction

D. in the opposite

direction

49.

Over which substance will the wooden box move most easily?

A.

B.

C.

D.

50. If a leaf and a dime are dropped from the same height, what force will cause the leaf to fall


more slowly?

A. frictional force

B. centripetal force

C. gravitational force

D. electromagnetic force

51. Alice lifted 5 bricks a height of 4 meters (m) each. Each brick weighed 110 newtons (N).

What was the total amount of work for Alice to move the bricks?

A. 20 joules

B. 440 joules

C. 550 joules

D. 2200 joules

52. The picture shows an investigation conducted by Galileo many years ago. He learned that

the speed of each ball increased as it fell, and that the balls fell at the same average speed.


Which of these statements is best supported by Galileo’s investigation?

A. Air resistance affects all objects equally.

B. Friction slows the acceleration of falling objects.

C. All falling objects accelerate toward Earth at the same

rate.

D. Objects with greater mass exert more force than objects with less

mass.

53. During a demonstration on falling objects, a science teacher explained to the class that all

objects acted upon by gravity alone will fall at the same rate. The teacher then took two identical sheets of paper and crumpled one of them into a ball and left the other sheet in its flat form. The teacher dropped the crumpled and flat sheets of paper from the same height and at the same time. Which statement best explains why the crumpled sheet landed on the floor before the flat sheet landed on the floor?


A. The crumpled sheet weighed more than the flat

sheet.

B. The crumpled sheet weighed less than the flat

sheet.

C. More air resistance acted on the crumpled sheet than on the flat sheet.

D. Less air resistance acted on the crumpled sheet than on the flat sheet.

54. A student pushes a box to slide it across the floor. Which statement explains why the box

begins to move?

A. The weight of the box is greater than the force of friction.

B. The weight of the box is less than the force of friction.

C. The applied force is greater than the force of friction.

D. The applied force is less than the force of friction.

55.

Some race cars are equipped with parachutes to help bring the car to a stop.

Which most likely causes the change in the velocity of the race car?

A. a balanced force exerted by the parachute

B. an increase in the force exerted by the car


C. a net force of zero between the car and parachute

D. an unbalanced force between the car and parachute

56. A car is traveling on a highway at a constant velocity. Which statement best describes the

forces acting on the car?

A. The forces acting on the car are balanced.

B. The forces acting on the car are in the same

direction.

C. The forces acting on the car are continuing to increase.

D. The forces acting on the car are equal to the force of gravity.

57.

The diagram shows forces acting on a ball at the same time.

Which arrow best shows the direction that the ball will move?

A.


B.

C.

D.

58. Which is an example of balanced forces?

A. a door starting to open

B. a basketball being held

C. a truck beginning to accelerate

D. a book falling off a table

59. Two students pull on a rope with 100 N in opposite directions. If the student on the left

increased her force to 125 N, the rope would most likely

A. go from rightward acceleration to leftward

acceleration.

B. go from motionless to leftward acceleration.

C. decrease its leftward acceleration.

D. decrease its rightward acceleration.


60.

The block shown is accelerating in the direction of the 10-N force at a rate of

What is the magnitude of force X?

A. 1 N

B. 5 N

C. 10 N

D. 20 N

61. In a game of tug-of-war, the people on each team pull with the amount of force

shown.

In which direction will the center of the rope go?

A. to the west because the net force is greater in this direction

B. to the east because the net force is greater in this direction


C. to the west because the net force is less in this direction

D. to the east because the net force is less in this direction

62. Two forces of 400 newtons (N) each are acting on a box.

Which statement best describes the forces at work?

A. The net force applied is zero.

B. A contact force resists movement.

C. The net force applied is unbalanced.

D. A contact force moves the object to the left.

63.

In which of the following cases would a decrease in friction be most beneficial?

A. the friction between the shoes of a jogger and the jogging track

B. the friction between the wheels of a car and the surface of a road

C. the friction between a rotating pulley and the axle that supports the

pulley

D. the friction between a rotating pulley and the rope that is used with the

pulley


64. A 6-N force and an 8-N force act at a 90-degree angle to each other on the same object.

What is the magnitude of the net force acting on the object?

A. 2 N

B. 5 N

C. 10 N

D. 14 N

65. An object is traveling to the right. Which of the following shows a force acting on the

object that will increase the speed of the object?

A.

B.

C.

D.

66. Four forces act on a box as shown.


What is the magnitude of the net force on the box?

A. 3 N

B. 5 N

C. 22 N

D. 37 N

67. Which statement best compares a parked car with a car moving along a straight line at a

constant speed?

A. There are no forces acting on either car.

B. Only the moving car is being subjected to forces.

C. Both cars are being subjected to balanced

forces.

D. Only the parked car is being subjected to balanced


forces.

68. A student walking quickly while carrying an orange on his lunch tray stops suddenly. The

orange will most likely roll off the tray due to

A. inertia of the orange.

B. centripetal force of the orange.

C. the friction acting on the orange.

D. the balanced forces acting on the orange.

69. A baseball player swings his bat and hits a ball along the ground. After some time, the

ball rolls to a stop on the level playing field.

What most likely causes the ball to stop moving?

A. a frictional force

B. the size of the bat

C. the mass of the ball


D. a gravitational force

70. In a lab investigation, a student notes that two metal blocks have the same mass. Based

on this observation, if the two blocks were put on opposite sides of a balance, they would best represent

A. balanced forces.

B. unbalanced forces.

C. equal and opposite reactions.

D. objects in motion.

71. Two identical sheets of paper are used in an experiment; one is crumpled into a ball and

the other is flat. What will most likely happen when they are dropped at the same time from the same height?

A. flat sheet will fall on its edge

B. both will fall at the same rate

C. crumpled sheet will fall faster

D. crumpled sheet will move

horizontally

72. What is the most reasonable explanation for why a toy car rolls farther on a wood floor

than on a thick carpet?

A. The car weighs more on the carpet.

B. The car weighs more on the floor.


C. The carpet has more

resistance.

D. The floor has more

traction.

73. Rodger pushes his skateboard across a sidewalk.

If the sidewalk is level, which would most likely make the skateboard lose its kinetic energy?

A. friction

B. heat

C. magnetism

D. temperatur

e

74.

When a 10-kg obj


ect falls through the atmosphere at terminal velocity, what is the net force acting on the object?

A. zer

o

B. 98

N

C. > 98 N


D. > 0 N < 98="">

75.

If the ball in the picture below moves east, which unbalanced force must be acting on it?


A.

B.

C.

D.

76.

A student conducted an experiment with a toy cart


by varying the force applied toward the right and observing the result. The force applied to the left was constant at 50 N. The t


able contains the data collected from the experiment.

MAGNITUDE OF FORCE ACTING

For a force of 50 N to the right, the student would


observe

A. a rapid motion to the right.

B. a rapid motion to the left.

C. a slight motion to the right.

D. no motion in either direction.


77.

The arrows indicate the direction a 40-mile-per-hour wind is blowing. Which shows the wind direction that would slow a mo


ving car the most?

A.

B.

C.

D.

78.

Roland dropped a rubber ball straight down. Aft


er falling for 2 seconds, the ball struck the ground with a force of 50 newtons (N). Which vector illustrates the reaction for


ce of the ground exerted on the ball?

A.

B.

C.


D.

79.

Gravity is a measurable force of attraction which acts upon objects. Which characteristic determines the gra


vity of an object?

A. frict

ion

B. ma

ss

C. tension

D. wei

ght

80.

A box is on a table. Maria and Julia push the box to


ward each other.

If Maria pushes with more force than Julia, in which direction


will the box most likely move?

A. Nor

th

B. Ea

st

C. So

uth

D. We

st

81.

The diagram shows forces acting on a box.


Which statement best describes what will happen to the box as a result of these forces being applied?

A. Th


e box will move up.

B. The box will move to the left.

C. The box will move to the right.

D. The box will remain stationary.

82 Wh


. en two unequal forces act in opposite directions on a moving object, the object will

A. absorb the forces.

B. come to an im


mediate stop.

C. continue to move in the same direction.

D. move in the samedirectionas the larger force.

83.

An airplane is flyi


ng with a net force of zero. This means the airplane is

A. slowing down and losing altitude.

B. moving at a constant speed an


d losing altitude.

C. slowing down and traveling along a straight line.

D. moving at a constant speed and traveling along a


straight line.

84.

How does a parachute sufficiently increase air resistance to allow the parachutist to land safely?

A. by


decreasing the force of gravity acting on the parachutist

B. by decreasing the total mass of the parachutist

C. by increasing the surroundi


ng air pressure around the parachute

D. by increasing the total surface area of the parachute

85.

To move a refrigerator, forces are


applied as shown.

Which of these statements best describes what will happen if the for


ces are applied at exactly the same time?

A. The refrigerator will move left, because of the greatest force on the right.

B. The refr


igerator will move right, because the force is over a greater surface area.

C. The refrigerator will remain in place, because the forces


are not enough to move a refrigerator.

D. The refrigerator will remain in the same place, because the net force is zero.

86.

A bowli


ng ball sitting motionless on a table exerts a downward force on the table. The force exerted by the table must be

A. equal to the


force of the ball.

B. continually changing with the ball.

C. greater than the force of the ball.

D. less than the force of the ball.


87.

Newton’s first law of motion states that an object at rest will stay at rest unless acted upon by an outside force. Wh


ich activity is an example of this law?

A. A football is kicked off a tee.

B. A baseball player slides into second base.

C. A floa


ting stick is carried over a waterfall.

D. A bicycle travels faster as it goes downhill.

88.

The picture shows a cross-country ski


er.

What causes the skier to move forward?

A. The skier’s arms move backward.

B. Th


e skier pushes the poles against the snow.

C. The skier’s legs move forward over the snow.

D. The skier leans his body forward.


89.

A student concludes that no forces are being applied to a laboratory cart that is moving at a constant velocity. Wh


ich statement best explains why the student’s conclusion is incorrect?

A. The cart must be subjected to a net force to continu


e moving at the same speed.

B. The direction of the cart is changed after unbalanced forces are applied.

C. The cart is subjected to


an applied force that cancels the effect of friction.

D. The net force on the cart must be in the direction of motion to overcome friction.


90.

Alicia gives her brother a push while he is seated on a swing. She finds that after a few seconds, she needs to


push again to keep him going. The reason her brother slows down is because the mechanical energy is converted into


A. potential energy that heats the air.

B. chemical energy that moves the swing.

C. kinetic energy which makes the swing slow down.


D. thermal energy that is released into the atmosphere.

91.

Mac and Janelle found a plate of cookies waiting on the center of


the square kitchen table when they got home. Each of them reached for the plate from opposite side of the table. Both of the


m grabbed the plate at the same time.

If Mac pulled with a force of 18 newtons (N)


and Janelle pulled with a force of 20 newtons (N), which correctly describes the forces applied to the plate of cookies?


A. The forces are equal and opposite in direction.

B. The forces applied to the plate of cookies are balanced.

C. The net force applie


d to the plate of cookies is 2 newtons (N).

D. The net force applied to the plate of cookies is 38 newtons (N).

92.

Marcus pu


shes against a refrigerator with a force of 300 newtons (N) to the right. Kelli pushes against the refrigerator with a force of 360 N


to the left.

How much additional force could Marcus apply in order to overcome the force


applied by Kelli?

A. 60 N to the right

B. 65 N to the right

C. 365 N to the left

D. 660 N to the left

93.

If a book sitting on


a flat table starts to move horizontally, it is most likely moving because

A. a balanced force is being applied.

B. a frictional


force is being exerted.

C. an unbalanced force is being applied.

D. a gravitational force is being exerted.

94.

When a bird


flies, its wings push air downward. As a result the air pushes back upward on the bird. Which law of motion most applies to the


way the wings of a bird beat?

A. All forces act in action-reaction pairs.

B. The rate of acceleration of an object depends on the


amount of force applied.

C. Objects in motion tend to remain in motion until acted upon by an another force.

D. An unbalanced force


acting on an object equals the mass of the object multiplied by its acceleration.

95.

A car runs out of fuel while traveling on a level


road and eventually comes to a stop. Which of the following best explains why the car stops?

A. Some of the energy of the car wa


s lost to friction.

B. Some of the energy of the car was destroyed.

C. The amount of kinetic energy increased.

D. The amount of


useful energy increased.

96.

The forces that act on an airplane as it flies are shown in the diagram.


If the airplane is moving forward through the air, which statement describes how one of the for


ces acting on the airplane has been overcome?

A. The lift force has overcome the drag force.

B. The weight force has overcome the


lift force.

C. The thrust force has overcome the drag force.

D. The drag force has overcome the weight force.

97.

The acceleratio


n due to gravity on Earth is commonly represented by the letter “g.” Based on this information, which of these quantities


represents the weight of a 10-kg mass on Earth?

A. 10 kg ÷

B. 10 kg ×

C. 10 kg +

D. 10 kg–

98.

In order for a rope to


anchor a boat in place, the rope must exert a force

A. equal to the force exerted by the water current in the opposite direction.


B. equal to the force exerted by the water current in the same direction.

C. greater than the forceexerted by the water current in the oppos


ite direction.

D. greater than the force exerted by the water current in the same direction.

99.

Ben coasts along a flat road on his


bike. Eventually his bike stops if he doesn’t continue to pedal. If energy is conserved, why doesn’t the kinetic energy sta


y constant and the bike continue to coast forever?

A. Friction causes some energy to be converted to matter.

B. Friction causes


some energy to be converted to heat.

C. The energy is collected by the brake system.

D. The energy is cooled by the rolling tires.


100.

A jet plane is moving at a constant velocity on a flat surface. Which forces act against the forward motion of the plane?


A. gravity and engine thrust

B. engine thrust and friction

C. friction and air resistance

D. airresistance and gravity

101.

Students


play volleyball on the beach. As the volleyball is about to cross the net, a strong wind blows. The directions of the ball and the


wind are shown in the diagram.

Based on the diagram, in what direction will the volleyball


travel after the wind hits it?

A.

B.

C.

D.

102.

The diagram shows two


forces acting on a ball at the same time.

Which arrow represents the most likely direction the ball


will move?

A.

B.

C.

D.

103.

A student draws a car with two vectors.


Which statement would best describe the diagram?

A. The forces of 800 N and 400 N should be multipli


ed to get the net force being applied to the car.

B. The applied forces of 800 N and 400 N will result in the car moving to the right.


C. The forces acting on the car are equal in magnitude and the car will remain motionless.

D. The magnitude of the forces acting on


the car are the same but the directions are opposite.

104.

A truck traveling down a road contains two wooden boxes in the center of


the bed of the truck. One box has a mass of 25 kilograms (kg) and the second box has a mass of 100 kilograms (kg).


• If the truck stopped suddenly, which box would most likely move more?

• Why would one bo


x move more than the other?

105.

The diagram shows forces acting on a wagon.

A wagon is pulled


to the right using a force of 20 N and to the left using a force of 30 N. What is the net force on the wagon?

A. 10 newtons to the left


B. 50 newtons to the left

C. 10 newtons to the right

D. 50 newtons to the right

106.

A block weighing 10 newtons is restin


g on a plane inclined 30° to the horizontal. What is the magnitude of the normal force acting on the block?

A. 5 N

B. 7 N

C. 9 N


D. 10

N

107.

When a skydiver jumps from a plane, the open parachute will increase the air resistance by

A. reducing fluid


friction.

B. increasing surface area.

C. increasing terminal velocity.

D. decreasing mass.

108.

A swimmer swims across a swim


ming pool, and at the end the pool she turns around and pushes off the wall with her feet. Which option describes a pair of act


ion-reaction forces during the push?

A. The force of her feet on the wall and the force of the wall on her feet.

B. The force


of gravity on her body and the force of her feet on the wall.

C. The force of gravity on her body and the force of the wall on her feet.


D. The force of her feet on the wall and the force of the water on her front.

109.

Mountain bike tires have large, knob-like tre


ads. These tires are useful on steep slopes because they

A. increase friction.

B. carry heavy weights.

C. increase the sto


pping distance.

D. prevent braking of the bicycle.

110.

What is one way land helps reduce the force of a hurricane as it


moves inland?

A. Land filters the water forced up from the sea by the wind.

B. Land acts as a bumpy surfacehat absorbs wind


power.

C. Land stabilizes the sediment forced on shore.

D. Land absorbs the rainwater.

111.

What advantage does a hiker ha


ve if he used snowshoes to walk across deep snow as opposed to regular hiking boots?

A. He would be able to slide on


ice.

B. He would be able to keep his feet warmer.

C. His weight would be distributed over a larger area.

D. The snow would melt


quicker, and it would be harder to walk.

112.

Rae dropped a bowling ball from a height of 8 meters. At which distance abov


e the ground was the ball most likely moving at the greatest speed?

A. 7.9 meters

B. 4.0 meters

C. 2.0 meters

D. 0.1 me


ter

113.

To a person standing motionless on the Earth’s surface on a day with no wind, in which direction would the rain ap


pear to fall?

A. vertically

B. diagonally

C. horizontally

D. circularly

114.

Nicolas is playing with his toy car. A parachute


in the back of the car is released to help slow down the car.

If the forces act on the car as shown in the pic


ture, what is the net force?

A.

B.

C.

D.

115.

Two forces act in opposite directions on a wood block.


What will happen if the forces are unbalanced?

A. The block will balance the forces.

B. The forces will reverse direction.


C. The mass of the block will change.

D. The position of the block will change.

116.

A teacher was discussing with the class tha


t a bowling ball has more inertia than a basketball. Which physical property is most likely being compared?

A. are

a

B. ma

ss


C. wei

ght

D. volume

117.

Mrs. Knight drops her briefcase. When the briefcase lands on the floor, what is the reaction force to the act


ion force of the briefcase on the floor?

A. the force of the floor on the briefcase

B. the attraction of Earth for the briefcase

C. the force


of air on the sides of the briefcase

D. the force of friction between the briefcase and the floor

118.

Students are designing kites to dis


cover what type of kite flies the highest. Which is the most important to consider when designing a kite to fly high?

A. string length


B. surface area

C. materials used

D. time of day

119.

Review the diagram.

If the ball is at rest


on the soccer field and the four forces shown are applied at the same time, the ball will

A. move to the left.

B. staythe same


position.

C. resist any change in movement.

D. accelerate in the direction of the smallest force.

120.

When a speeding meteor enters


Earth’s atmosphere, it slows down and becomes very hot due to friction. Which factor most influences the amount of friction


that a meteor encounters when it enters the atmosphere?

A. the weather

B. magnetism

C. solar energy

D. air density


121.

Students conducted an investigation by dropping a ball from two different heights. In the first trial, the ball was dropped


from a height of 10 meters and the speed was measured after 2 seconds. In the second trial, the ball was dropped from


a height of 20 meters and the speed was measured after 2 seconds. Which of these describes the relationship between the


measured speeds in the two trials?

A. The speed in the second trial is twice the speed in the first trial.

B. The speed in the first trial


will be the same as the speed in the second trial.

C. The speed in the first trial will be 10m/sec faster than the speed in the second trial.


D. The speed in the second trial will be 10m/sec faster thanhe speed in thefirst trial.

122.

Two forces act on a block as shown


in the picture.

What is the net force on the block?

A. 10 N to the left

B. 10 N to the right

C. 30 N to the right


D. 30 N to the left

123.

As a meteor falls and gets closer to Earth, it encounters a resistance force. Which must occur so tha


t the meteor overcomes the resistance force?

A. The sum of the forces acting on the meteor needs to be zero.

B. The forces


acting on the meteor must be in the same direction.

C. The force of gravity needs to be greater than the resistance force.

D. The resi


stance force must be greater than the force being applied to the meteor.

124.

Brittany pedaled her bicycle quickly on a level


surface. When she stopped pedaling and coasted, the bicycle slowed and came to a stop. What happened to the energy of


the moving bicycle as it coasted to a stop?

A. It was transferred to heat due to friction.

B. It was reabsorbed into Brittany’s


muscles.

C. It was stored in the bicycle wheels as potential energy.

D. It was transferred to the air in the form of visible light.


125.

The arrows in the diagram below represent equal forces acting on balls that are resting on a table.


Which of the balls will be accelerated if the forces are applied?

A. Bal

l 1

B. Bal

l 2

C. Bal

l 3

D. Bal

l 4


126.

Which of the following combinations of forces results in the object accelerating to the right?

A.

B.

C.


D.

127.

A young boy is shown swinging over the water.


Identify at least two types of friction that will have


an effect on his speed. In your explanation, be sure to include the objects and motions that create friction.

128.

What


is the amount of force required to accelerate a 20 kg object to 5 m/s²?

A. 0.2

5 N

B. 4 N

C. 15

N

D. 10

0 N

129.

An engineer


builds a model of a machine pivot. Instead of the two parts of the pivot directly touching one another, they have ball bearing


s between them.

As an indication of the amount of friction in the pivot, what should the


engineer measure?

A. the radius of the ball bearings before the pivot has been used

B. the increase in mass of the ball bearings when the piv


ot rotates

C. the temperature increase in the ball bearings when the pivot rotates

D. the number of ball bearings remaining after the


pivot has been used

130.

A student pushes a box with a force of 15 newtons (N) to make it slide across the floor. Once


the box starts moving, a frictional force of 5 N acts upon it.

If the student continues to push the box with a


force of 15 N, what will happen to the box?

A. The box willstop moving forward.

B. The box will move forward at a steady speed.


C. The box will move forward at a decreased speed.

D. The box will move forward at an increasing speed.

131.

Students push with


opposite forces on the sides of a toy wagon.

What is the net force acting on the wagon?


A.

B.

C.

D.

132.

In a tug-of-war game, balanced forces are best represented when both teams ca


use the flag to

A. stay in the middle.

B. fall to the ground.

C. move slowly in one direction.

D. be pulled quickly in one direction.


133.

The rate of acceleration of an object is determined by the mass of the object and

A. the initial velocity of the object.

B. the for


ces acting on the object.

C. the direction of movement of the object.

D. the change in kinetic energy of the object.

134.

Cody and Adam are


pulling on a rope. Each boy is trying to pull the flag attached to the middle of the rope to his side.


If each boy pulls with the force shown, what is the net force acting on the rope?

A.

B.


C.

D.

135.

A 20 N object is placed on a surface and starts to slide. What is the most likely reason the object be


gins to move?

A. Gravity exerts a balanced force on the object.

B. An unbalanced force causes acceleration.

C. Friction is applied


to the object.

D. The forces acting on the object are in equilibrium.

136.

Three forces are acting on a ball that is at rest.


If the 5-N force and the 12-N force form a 90-degree angle, what is the


magnitude of the force acting in the direction of the dashed arrow?

A. 7 N

B. 13

N

C. 17

N

D. 60

N

137.

The illustration


below shows forces acting on a box.

What is the net force on the box if the sliding friction between the bo


x and the floor is 5N?

A. 5N to the left

B. 8N to the right

C. 13N to the right

D. zero net force

138.

Which example best


illustrates an action-at-a-distance force?

A. lifting a box

B. an apple falling

C. pulling a nail out of wood

D. a car moving along


a flat surface

139.

If a ball rolls at a constant rate on a flat surface, the motion is due to

A. gravitational forces.

B. frict


ional forces.

C. electromagnetic forces.

D. balanced forces.

140.

A student pushes on an object with a force of 6 newt


ons and the object does not move. What force does the object exert on the student’s hands?

A. 0 N

B. 3 N

C. 6 N

D. 12

N


141.

One person pulls on a rope with a force of 400 N to the right. Another person pulls on the opposite end with a force of 60


0 N to the left. What is the unbalanced net force?

A. 200 N to the left

B. 400 N to the left

C. 600 N to the left

D. 1000 N to the left


142.

A toy car starts at the top of a ramp, rolls down and slows to a stop.

Wh


ich acts most to bring the car to a stop?

A. frict

ion

B. magnetism

C. wind speed

D. electrical force

143.

Rowing a boat for


ward requires a force that will overcome friction from water and wind. Which factor most helps overcome the forces working


against the boat?

A. the length of the boat

B. the height of sides of the boat

C. the weight of the rowers in the boat

D. the number of


people rowing in the boat

144.

A student swings a ball on a string as shown in the diagram below. The ball follows a cir


cular path.

Part A: How does centripetal force keep the ball on its circular path?


Part B: Describe one other force acting on the ball.

145.

When the first American astronauts were planning to walk on the


Moon, they knew that the gravity on the Moon was less than the gravity on Earth. With this information, what did the astronaut


s expect to be most different on the Moon?

A. their mass

B. their height

C. their weight

D. their volume

146.

A batter


y-powered toy sailboat heading south on a pond catches a wind blowing from east to west. The combination of forces will


cause the sailboat to move in which direction?

A. northeast

B. northwest

C. southeast

D. southwest

147.

When astronauts wal


ked on the Moon, they used weighted boots to help them walk due to the lower gravitational pull. What difference between


Earth and the Moon accounts for the difference in gravity?

A. density

B. diameter

C. ma

ss

D. volume

148.

Max push


ed and released a toy dump truck on a flat sidewalk. The truck traveled for a long distance and stopped when it hit a wall.


Which best explains why the truck traveled the long distance to the wall?

A. The truck had inertia due to its mass.

B. Gravity


pulled the truck to the wall.

C. Magnetism pulled the truck to the wall.

D. The sidewalk applied friction to the truck.

149.

Mimi pu


shes a book from the edge of a table and releases it at Point 1. It slides across the table and stops at Point 2.


Which statement best explains the forces that act on the book as it slides across the table?

A. The


friction force increases between Point1 and Point2.

B. The friction force decreases momentum between Point 1 and Point 2.


C. The force applied from the push decreases between Point1 and Point2.

D. The pushing force starts at Point1 and the frict


ion force stops at Point2.

150.

Which of these is an example of Newton’s First Law of Motion?

A. A baseball hit with a baseb


all bat travels faster than a bowling ball hit with the same force.

B. A basketball bounces on the ground with the same force that the


ground pushes up on the ball.

C. A person jumps to a dock from a boat, and the boat moves away from the dock.

D. A person sta


nding on a bus moves backward when the bus suddenly moves forward.

151.

All of the forces acting on a helicopter are balanced.


The reduction of which force would cause the helicopter to drop in altitude?

A. lift

B. dra

g


C. thr

ust

D. wei

ght

152.

A helicopter ambulance flew from one hospital to another in a straight line. The pilot had to ch


ange speed several times due to the presence of other aircraft.

What


was the average speed of the helicopter during the trip?

A. 2.0 km/min

B. 2.5 km/min

C. 4.0 km/min

D. 7.5 km/min

153.

This graph


shows the distance traveled by a remote control toy car over time.

If the car


continues moving at the same rate, how far will it travel in 2 minutes?

A. 10

m

B. 60

m

C. 120 m

D. 200 m


154.

Alesia is taking an all-day ride on her bicycle. The graph shows how far she is from home at different times during her ride.


During which time period is Alesia moving fastest?

A. 0–1 hours

B. 3–


4 hours

C. 4–5 hours

D. 6–7 hours

155.

A toy robot moved from a starting point, traveling in a straight line at differe


nt speeds and then turning around and returning to the starting point at different speeds.


What is the total distance that the toy robot traveled?

A. 12

m

B. 24

m


C. 48

m

D. 96

m

156.

Two toy cars are traveling on a track.

Thirteen mi


nutes after they start, how do the speeds of the cars compare?

A. Both cars are traveling at the same speed.

B. Both cars hav


e stopped moving on the track.

C. Car 1moving faster.

D. Car 2moving faster.

157.

This graph shows the motion of an obj


ect as it moves away from a point and then back to its starting point.

Which graph


shows the total distance traveled by the object?

A.


B.

C.

D.


158.

This is a graph of the motion of a small boat traveling at a constant speed.


How far will the boat travel in 15 hours?

A. 10

km

B. 15

km

C. 25

km

D. 30

km


159.

A drill head attached to an arm on an automated tool moved from a starting point, traveling in a straight line at diff


erent speeds and then returning to the starting point at different speeds.


During which time period was the drill head moving fastest?

A. 0–2 secon


ds

B. 2–3 seconds

C. 3–4 seconds

D. 4–6 seconds

160.

Tisa and Lily ran a race in gym class. Lily was off bal


ance so she did not start until 2 seconds had passed.

What were the av


erage speeds of the two runners during the periods in which they were actually running? (Note: Lily did not start running until


time = 2 s.)

A. Tisa: 6.0 m/s; Lily: 6.0 m/s

B. Tisa: 6.0 m/s; Lily: 7.5 m/s

C. Tisa: 7.5 m/s; Lily: 6.0 m/s

D. Tisa: 7.5 m/s; Lily: 7.5


m/s

161.

This graph shows the motion of a bus.

If the bus continu


es moving at the same speed, what is the total distance that it will have traveled in 7.5 minutes?

A. 1500 m

B. 7000 m


C. 7500 m

D. 8000 m

162.

The graph shows the motion of four cars. All four cars are moving east.


Which car has a constant velocity?

A. 1

B. 2

C. 3

D. 4

163.

Two swimmers compete


d in a race. The graph shows how the position of both swimmers changed over time during the race.


At what rate of speed did Swimmer 1 travel throughout the race?

A.

B.


C.

D.

164.

The motion of a toy car is shown in the graph below.

In which secti


on of the graph is the car’s speed increasing?

A. W

B. X

C. Y

D. Z

165.

Students measure how far a snail can travel


per minute. The graph shows their data.

What is the speed of the snail?

A. 0.2


5 min/cm

B. 0.50 min/cm

C. 1.00 cm/min

D. 4.00 cm/min

166.

The graph shows the motion of a student walking at different


speeds.

During which time interval does the student walk with a negative accel


eration?

A. 0–2 seconds

B. 2–4 seconds

C. 4–8 seconds

D. 8–12 seconds

167.

Four students went on a 3-kilomate


r hike. Each student was hiking a different speed. The distance the students hiked during the first 30 minutes is shown in ea


ch graph. If each student continued at the same speed, which graph shows the hiker that finished the 3-kilometer hike first?


A.

B.

C.


D.


Cabarrus County Schools / District Homepage · Web viewA student applies a 10 N force to a wood block with a mass of 5 kg. The block is pushed across four different surfaces. The

Documents