Download AP Physics Semester One Exam Review (Chapters 2

Mr. Clarkston - Physics 1 First Semester Final Exam
When?
FRQs
MC Questions
Monday
December 16, 2013
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: http://www.batesville.k12.in.us/Physics/PhyNet/quiz_index.htm
2) From South Carolina State University: http://www.cnrt.scsu.edu/~dms/P201/FA97.html
3) From a College-level textbook (practice quizzes) http://cwx.prenhall.com/bookbind/pubbooks/giancoli/
4) From another College-level textbook publisher http://cwx.prenhall.com/bookbind/pubbooks/wilson/
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)?
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?
A) The car accelerates, stops, and reverses
B) The car accelerates at 6 m/s2 for the first 2 s
C) The car is moving for a total time of 12 s
D) The car decelerates at 12 m/s2 for the last 4 s
E) The car returns to its starting point when t = 9 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?
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?
A)I.
B) II.
C) III.
D) IV.
E) V.
5. Displacement can be obtained from:
A) the slope of an acceleration-time graph
B) the slope of a velocity-time graph
C) the area under an acceleration-time graph
D) the area under a velocity-time graph
E) the slope of 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
B) can be as large as 19.8 m/s2
C) can be horizontal
D) is zero
E) none of these
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:
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:
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:
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:
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?
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:
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.
A)
B)
C)
D)
E)
Force:
equals the negative integral (with respect to distance) of the potential energy function
is the ability to do work
is the rate of change of doing work
equals the time rate of change of momentum
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.
A)
B)
C)
D)
E)
If the total momentum of a system is changing:
particles of the system must be exerting forces on each other
the system must be under the influence of gravity
the center of mass must have constant velocity
a net external force must be acting on the system
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