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Fsica 11 de secundaria
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Profesor: Javier Trigoso T.
01.A force acts on a moving rubber ball. How many of the following changes
could happen to the ball because of the force?
A change in direction
A change in shape
A change in mass
A change in speed
A. 1 B. 2 C. 3 D. 4
02.
In which of these situations is no resultant force needed?A. A car changing direction
B. A car moving in a straight line at a steady speed
C. A car slowing down
D. A car speeding up
03.Which combination of forces would result in the car moving at constant
speed?
air resistance friction driving force
A 200 N 1 000 N 800 N
B 800 N 1 000 N 200 N
C 800 N 200 N 1 000 N
D 1 000 N 200 N 800 N
04.Which property of an object cannot be changed by a force?
A. its mass B. its motion
C. its shape D. its size
05.Which combination of forces produce a resultant force acting towards the
right?
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Fsica 11 de secundaria
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Profesor: Javier Trigoso T.
06.
A girl and a boy are pulling in opposite directions on a rope. The forces
acting on the rope are shown in the diagram
Which single force has the same effect as the two forces shown?
A.
50 N acting towards the girl
B. 350 N acting towards the girl
C. 50 N acting towards the boy
D.
350 N acting towards the boy
07.A car of mass 750 kg has a horizontal driving force of 2.0 kN on it. It has a
forward horizontal acceleration of 2.0 m/s2
What is the resistive force acting horizontally?
A. 0.5 kN B. 1.5 kN C. 2.0 kN D. 3.5 kN
08.Below are four statements about the effects of forces on objects. Three of
the statements are correct.
Which statement is incorrect?
A. A force can change the length of an object
B.
A force can change the mass of an object
C. A force can change the shape of an object
D. A force can change the speed of an object
09.
Two forces act on an object.
In which situation is it impossible for the object to be in equilibrium?
A. The two forces act in the same direction
B. The two forces act through the same point
C. The two forces are of the same type
D. The two forces are the same size
10.An astronaut has a mass of 100 kg. What is his weight on Earth if the
gravitational field strength is 10 N/kg?
A. 10 N B. 110 N C. 1000 N D. 100 N
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Fsica 11 de secundaria
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Profesor: Javier Trigoso T.
11.
Two forces of 6 N and 3 N act upon an object in opposite directions. What
would be the acceleration of this object if it has a mass of 100 kg?
A. 0.03 m/s2 B. 0.09 m/s2
C. 0.3 m/s2 D. 0.9 m/s2
12.What can we say about the resultant force acting on an object at terminal
velocity?
A. It acts upwards B. It is not zero
C. It is zero D. It acts downwards
13.A wooden block of mass 0.60 kg is on a rough horizontal surface. A force of
12 N is applied to the block and it accelerates at 4.0 m/s 2
What is the magnitude of the frictional force acting on the block?
A. 2.4 N B. 9.6 N C. 14 N D. 16 N
14.A balloon is acted upon by three forces, weight, up
thrust and sideways force due to the wind, as shown in
the diagram
What is the vertical component of the resultant force on
the balloon?
A. 500 N B. 1 000 N
C. 10 000 N D. 10 500 N
15.A car with front-wheel drive accelerates in direction shown.
Which diagram best shows direction of the total force exerted by the road
on front wheels?
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Fsica 11 de secundaria
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Profesor: Javier Trigoso T.
16.
A plastic ball in a liquid is acted upon by its weight and by a buoyant force.
The weight of the ball is 3.6 N. The buoyant force has a magnitude of 4.3 N
and acts vertically upward. At a given instant, the ball is released from rest.
The acceleration of the ball at the instant, including direction, is closets to:
A. 0.95 m/s2, downward B. 1.9 m/s2, downwardC. 1.9 m/s2, upward D. 0.95 m/s2, upward
17.A 10 kg box is placed on a table. A horizontal force of magnitude 32 N is
applied to the box. A frictional force of magnitude 7 N is present between
the surface and the box. Calculate the acceleration of the box.
A. 0.25 m/s2 B. 2.5 m/s2
C. 0.025 m/s2 D. 25 m/s2
18.Which of the following systems will produced maximum acceleration?
19.Two equal weights of 100- N are attached to a spring scale as shown in Fig.
Does the scale reading is?
A. zero B. 100 N C. 200 N D. other reading
20.If we double the resultant force applied to an object, what happens to its
acceleration?A. It stays the same B. It doubles
C. It halves D. Depends on the mass
