Physics Test Review Vocabulary and Trivia. Round 1 Gravity Mass Sliding Friction Unbalanced Forces Force Velocity.

Physics Test ReviewVocabulary and

Trivia

Round 1GravityMassSliding FrictionUnbalanced ForcesForceVelocity

Round 2NewtonBalanced ForcesRolling FrictionWeightTensionSpeedDistance

Round 3Elastic ForcesFrictionFluid FrictionFree FallInertiaDisplacement

Round 4Net ForceStatic FrictionAir resistanceCompressionAccelerationSpeedReference Point

• The force of friction between a bag of sports equipment and the floor is 15 N. What is the net force on the bag if two people pull with 45 N and 60 N of force in the same direction?

F - 400Object Net Force (N) Mass (kg)

Boulder 100 100

Suitcase 20 100

Shopping Cart 100 20

Book 20 20

• Which object would have the greatest acceleration?

• What is the difference between balanced and unbalanced forces?

A - 100

• Explain how car tires are designed to both increase friction when the car needs to stop and decrease friction when the car needs to move.

B - 100

A child on his way home from school walks 1 block east, 1 block north, then 1 blocks west, and 3 blocks north.

• What is the distance the child walked?

• What is the child’s displacement?

B - 200

• A person tries to slide a heavy box, but the box doesn’t move. What type of friction is responsible for the box not moving?

• Name 2 things the person could do to reduce this type of friction.

B - 300

C - 200

• What are 3 ways an object can accelerate?

F – 500

• The force of friction between a 10-kg bag of sports equipment and the floor is 15 N. What is the bag’s acceleration if a person pulls it with 30 N of force?

• Give one reason how electric and magnetic forces are similar.

• Give one reason how electric and magnetic forces differ.

C - 500

D - 300 You are in a car that is stopped at a red light. You place your cell phone on the dash board for a moment but then the light turns green, so you step on the gas pedal and accelerate the car. Explain what happens to the cell phone using term inertia.

• An object is traveling at a constant speed of 2 m/s. What is the object’s speed after 4 seconds?

C - 100

F - 200• Explain how the forces

on a SCUBA diver change

as he/she descends deeper

into the ocean.

E - 300E – 500

• What does the slope of the line represent?• According to the red line, what is happening

between 4 and 7 seconds?

D – 500How are free fall, gravity, and acceleration related?

• A child on his way to school walks 2 blocks towards the school, realizes he forgot his homework and goes back home. From

home he walks 5 blocks to school. If the child took a total of 15 minutes to do this,

what is the child’s velocity?

A – 30023 N18 N

• What is the net force?• How does the object move?

• Are the forces balanced or unbalanced?

6 N

D - 400• Which graph shows that an object is

accelerating? Why?

• Write the 3 speed equations needed to solve for:• Speed

• Distance• Time

A - 500

B - 500

• Explain how ice skates are designed to both increase and decrease friction.

• A bowling ball and a feather are dropped from a 5-story building. Which hits the ground first and why?

C – 300

C- 400• A cell phone is accidently dropped from a tall building. Describe the cell phone’s motion.

• What is the net force?• How does the object move?

• Are the forces balanced or unbalanced?

A – 40027 N 18 N

9 N

• What does Newton’s 1st Law state?

D - 100

• Name the two types of elastic forces and give an example of each.

D - 200

E - 100• Describe the object’s motion from start to finish.

E - 200

Give an example of Newton’s 3rd Law at work.

• A skydiver jumps from an airplane and is freefalling. Describe the skydiver’s motion relative to an observer on the ground. (According

to the observer on the ground, is the skydiver moving? Explain.)

A - 200

E - 400• Explain why a rifle recoils as the bullet is pushed

out of the barrel.

F - 100• In a game of tug of war, you pull on a rope

with a force of 100 N to the right and your friend pulls on the rope with a force of 100 N to the left. What is the net force on the rope?

• How much time would it take an airplane flying at 500 km/h to travel 3000 km?