AP Physics Semester One Exam Review (Chapters 2 - 12)



Mr. Clarkston - Physics 1 First Semester Final Exam

When? FRQs Monday December 16, 2013

MC Questions Wednesday December 18, 2013

What? Here is the topic breakdown

Motion

Vectors

Newton’s Laws

Energy/Work/Power

Momentum/Impulse

Simple Harmonic Motion

LINKS for Physics Practice Quizzes (for your practice and review)

1) From Batesville HS in Illinois:

2) From South Carolina State University:

3) From a College-level textbook (practice quizzes)

4) From another College-level textbook publisher

AP Physics Semester One MC Exam Review

1. An object is thrown vertically into the air. Which of the following five graphs represents the velocity (v) of the object as a function of the time (t)?

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A) I. B) II. C) III. D) IV. E) V.

2. The diagram represents the straight line motion of a car. Which of the following statements is true?

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A) The car accelerates, stops, and reverses D) The car decelerates at 12 m/s2 for the last 4 s

B) The car accelerates at 6 m/s2 for the first 2 s E) The car returns to its starting point when t = 9 s

C) The car is moving for a total time of 12 s

3. An elevator is moving upward with constant acceleration. The dashed curve shows the position y of the ceiling of the elevator as a function of the time t. At the instant indicated by the dot, a bolt breaks loose and drops from the ceiling. Which curve best represents the position of the bolt as a function of time?

F02070.TIF[pic]

A) I. B) II. C) III. D) IV. E) V.

4. Which of the five following graphs is correct for an object moving in a straight line at a constant velocity of 20 m/s?

F02066.TIF[pic]

A) I. B) II. C) III. D) IV. E) V.

5. Displacement can be obtained from:

A) the slope of an acceleration-time graph D) the area under a velocity-time graph

B) the slope of a velocity-time graph E) the slope of an acceleration-time graph

C) the area under an acceleration-time graph

6. An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is19.6 m/s2. The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect friction.

A) half

B) _

√2 times

C) twice

D) four times

E) cannot be calculated from the given data

7. Two vectors lie with their tails at the same point. When the angle between them is increased by 20° their scalar product has the same magnitude but changes from positive to negative. The original angle between them was:

A) 0 B) 60° C) 70° D) 80° E) 90°

8. Two projectiles are in flight at the same time. The acceleration of one relative to the other:

A) is always 9.8 m/s2 D) is zero

B) can be as large as 19.8 m/s2 E) none of these

C) can be horizontal

9. A ferry boat is sailing at 12 mph 30° W of N with respect to a river that is flowing at 6.0 mph E. As observed from the shore, the ferry boat is sailing:

A) 30° E of N B) due N C) 30° W of N D) 45° E of N E) none of these

10. Two blocks (X and Y) are in contact on a horizontal frictionless surface. A 36-N constant force is applied to X as shown. The force exerted by Y on X is:

F05070.TIF[pic]

A) 1.5 N B) 6.0 N C) 29 N D) 30 N E) 36 N

11. Three books (X, Y, and Z) rest on a table. The weight of each book is indicated. The force of book Z on book Y is:

F05066.TIF[pic]

A) 0 B) 5 N C) 9 N D) 14 N E) 19 N

12. Two blocks are connected by a string and pulley as shown. Assuming that the string and pulley are massless, the magnitude of the acceleration of each block is:

F05060.TIF[pic]

A) 0.049 m/s2 B) 0.020 m/s2 C) 0.0098 m/s2 D) 0.54 m/s2 E) 0.98 m/s2

13. A 32-N force, parallel to the incline, is required to push a certain crate at constant velocity up a frictionless incline that is 30° above the horizontal. The mass of the crate is:

A) 3.3 kg B) 3.8 kg C) 5.7 kg D) 6.5 kg E) 160 kg

14. Block A, with a mass of 10 kg, rests on a 35° incline. The coefficient of static friction is 0.40. An attached string is parallel to the incline and passes over a massless, frictionless pulley at the top. The largest mass mB, attached to the dangling end, for which A remains at rest is:

F06040.TIF[pic]

A) 2.5 kg B) 3.5 kg C) 5.9 kg D) 9.0 kg E) 10.5 kg

15. A 50-N force acts on a 2-kg crate that starts from rest. At the instant the particle has gone 2 m the rate at which the force is doing work is:

A) 2.5 W B) 25 W C) 75 W D) 100 W E) 500 W

16. A kilowatt hour is a unit of:

A) power B) energy/time C) work D) power/time E) force/distance

17. A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5x105 N/m. At its greatest compression the reading on the scale is:

A) 15 N B) 30 N C) 1.5x103 N D) 2.1x103 N E) 3.2x103 N

18. A 5 kg projectile is fired over level ground with a velocity of 200 m/s at an angle of 25° above the horizontal. Just before it hits the ground its speed is 150 m/s. Over the entire trip the change in the internal energy of the projectile and air is:

A) +19,000 J B) -19,000 J C) +44,000 J D) -44,000 J E) 0

19. The first graph shows the potential energy U(x) for a particle moving on the x axis. Which of the following five graphs correctly gives the force F exerted on the particle?

F08048.TIF

A) I. B) II. C) III. D) IV. E) V.

20. A 1000-kg space probe is motionless in space. To start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s. At the end of this process it is moving at 20 m/s. The approximate mass of the ejected gas is:

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A) 0.8 kg B) 4 kg C) 5 kg D) 20 kg E) 25 kg

21. A cart loaded with sand slides along a horizontal frictionless track. As the cart moves, sand trickles out at a constant rate through a hole in the back of the cart. The speed of the cart will:

A) decrease at a constant rate D) decrease at a variable rate

B) increase at a constant rate E) increase at a variable rate

C) remain the same

22. Force:

A) equals the negative integral (with respect to distance) of the potential energy function

B) is the ability to do work

C) is the rate of change of doing work

D) equals the time rate of change of momentum

E) has dimensions of momentum multiplied by time

23. A man is marooned at rest on level frictionless ice. In desperation, he hurls his shoe to the right at 45 ft/s. If the man weighs 180 lb and the shoe weighs 1.0 lb, the man moves to the left at approximately:

A) 1 ft/s B) 0.25 ft/s C) 32 ft/s D) 4 ft/s E) 9 ft/s

24. In a tug-of-war game the winning team stands its ground. It pulls the rope through its hands without moving along the ground. The losing team does not let the rope slip but drags its feet along the ground as it moves with constant velocity. For the system composed of the two teams and the rope, which of the following statements is true while the losing team is moving?

A) External forces are doing positive work. D) Internal forces are doing zero work

B) External forces are doing zero work. E) None of the above statements are true.

C) Internal forces are doing positive work

25. If the total momentum of a system is changing:

A) particles of the system must be exerting forces on each other

B) the system must be under the influence of gravity

C) the center of mass must have constant velocity

D) a net external force must be acting on the system

E) none of the above

26. A projectile in flight explodes into several fragments. The total momentum of the fragments immediately after this explosion:

A) is the same as the momentum of the projectile immediately before the explosion

B) has been changed into kinetic energy of the fragments

C) is less than the momentum of the projectile immediately before the explosion

D) is more than the momentum of the projectile immediately before the explosion

E) has been changed into radiant energy

27. Two objects, X and Y, are held at rest on a horizontal frictionless surface. A spring is compressed between X and Y. The mass of X is 2/5 times the mass of Y. When the objects are released, the ratio of the kinetic energy of X to that of Y is:

A) 2/5 B) 4/25 C) 25/4 D) 5/2 E) 1

28. Blocks A and B are moving toward each other along the x axis. A has a mass of 2.0 kg and a velocity of 50 m/s (in the positive x direction), while B has a mass of 4.0 kg and a velocity of -25 m/s (in the negative x direction). They suffer an elastic collision and move off along the x axis. After the collision the velocities of A and B, respectively, are:

A) -50 and 25 m/s B) 50 and -25 m/s C) -25 and 50 m/s D) 25 and -50 m/s E) -25 and -50 m/s

29. Block A, with a mass of 2.0 kg, moves along the x axis with a velocity of 5.0 m/s (in the positive x direction). It suffers an elastic collision with block B, which initially has a velocity of -2.0 m/s (in the negative x direction). The blocks leave the collision along the x axis. If B is much more massive than A, the velocity of A after the collision is:

A) 0 B) -3.0 m/s C) -5.0 m/s D) -7.0 m/s E) -9.0 m/s

30. A horizontal moving walkway is moving at 3 m/s. On the average, during each second, four stationary people step onto it and four people step off it. Assuming each person's mass is 60 kg, what average driving force must be exerted on the walkway to keep it moving?

A) 45 N B) 80 N C) 720 N D) 1080 N E) 2400 N

31. Two pendulum bobs of unequal mass are made of perfectly elastic material. They are suspended from the same fixed point by strings of equal length. The lighter bob is drawn aside and then released so that it collides with the other bob on reaching the vertical position. What quantities are conserved in this collision?

A) Both kinetic energy and angular momentum of the system

B) Only kinetic energy

C) Only angular momentum

D) Angular speed of lighter bob

Answer Key

1. C

2. B

3. B

4. E

5. D

6. A

7. D

8. D

9. B

10. D

11. C

12. E

13. D

14. E

15. E

16. C

17. E

18. C

19. D

20. B

21. C

22. D

23. B

24. C

25. D

26. A

27. D

28. A

29. E

30. C

31. C

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