Ap Physics Worksheet With Answers
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8AP Physics 1 Test Review
Physicist: KEY
Chapter 8 – Rotational Motion
Chapter 6 – Work, Energy & Power
Chapter 7 – Momentum & Collisions
Chapter 6 – Work, Energy & Power
Multiple Choice:
1. What two factors is work dependent upon?
A. force & energy
B. force & distance
A
B
C
D
C. distance & energy
D. energy & momentum
2. Work is done only if the applied force does which of the following?
A. equals zero
B. acts in the same direction as gravity
A
B
C
D
C. is greater than the weight D. produces motion
3. The transfer of energy by mechanical means is
A. momentum
B. work
A
B
C
D
C. effort
D. acceleration
4. A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of
work, but different amounts of
A
B
C
D
A. energy
B. power
C. both of these
D. none of these
5. An object that has potential energy has this energy because of its
A. speed
B. acceleration
A
B
C
D
C. momentum
D. location
6. A ball is thrown vertically upward. Which one of the following quantities increases as the ball rises?
A. total mechanical energy
B. potential energy
A
B
C
D
C. kinetic energy
D. speed
7. A ball is thrown vertically upward. Which one of the following quantities decreases as the ball rises?
A. total mechanical energy
B. potential energy
A
B
C
D
C. kinetic energy
D. speed
8. A ball is thrown vertically upward. Which one of the following quantities remains constant as the ball
rises?
A
B
C
D
A. total mechanical energy
B. potential energy
C. kinetic energy
D. speed
9. A box of rivets falls from the top of a skyscraper under construction. As the box passes the 80th
floor, it has a kinetic energy of E
. By the time it passes the 20th floor its speed has doubled. By
k
then its kinetic energy is
A
B
C
D
A. (1/4) E
B. (1/2) E
k
k
C. 4 E
D. 2 E
k
k
10. The total amount of energy in an isolated, closed system
A. is constantly increasing
B. is constantly decreasing
A
B
C
D
C. remains constant
D. cannot be accurately measured
2
11. The moment of inertia of a solid cylinder about its axis is given by 0.5 MR
. If this cylinder rolls without
slipping, the ratio of its rotational kinetic energy to its translational kinetic energy is
A
B
C
D
A. 1:1.
B. 1:2.
C. 2:1.
D. 1:3.
12. "The total angular momentum of a system of particles changes when a net external force acts on the
system." This statement is
A. always true.
A
B
C
D
B. never true.
C. sometimes true. It depends on the force's magnitude.
D. sometimes true. It depends on the force's point of application.
Short Answer:
13. A 40.0- kg object initially at rest slides down from the top of a ramp. The ramp is raised 8.0 m at one end. The object reaches the
bottom of the ramp with a speed of 7.0 m/s. How much of the original potential energy was converted to forms of energy other than
kinetic?
ΔEp = ΔEk
2
Mgh = ½ Mv
+ W
friction
2
(40 kg)(9.8 N/kg)(8.0 m) = (1/2)(40 kg)(7.0 m/s)
+ W
friction
3136 J = 980 J + W
friction
W
= 2156 J
friction
14. A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. What is the efficiency of
the jack system?
e = (1000 J)/(2000 J) * 100% = 50 %
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