WorksheetsAP Physics Work-Energy Quick Review
Total questions: 26
Worksheet time: 26mins
Name
Class
Date
1.
Kinetic Energy is defined as
a)
Energy stored due to its location
b)
Energy of motion
c)
Energy stored in the bonds of molecules
d)
Heat energy
2.
Which of the following objects has the most kinetic energy?
a)
A 20 kg toddler running at 5 m/s
b)
A 50 kg toddler running at 30 m/s
c)
A 90 kg toddler running at 30 m/s
d)
A 100 kg toddler running at 2 m/s
3.
You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?
a)
Potential Energy
b)
Kinetic Energy
c)
Nuclear Energy
d)
Chemical Energy
4.
The unit for energy and work is
a)
J
b)
N
c)
m/s
d)
m/s/s
5.
A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is
a)
60 J
b)
600 J
c)
17 J
d)
2.4 J
6.
If you exert a force of 20 N to push a desk 10 m, how much work did you do to the desk?
a)
20 N
b)
200 N
c)
200 J
d)
2 J
7.
The law of conservation states that
a)
every action has an equal and opposite reaction
b)
all matter has thermal energy
c)
energy cannot be created or destroyed, only changes form
d)
heat moves from an object of higher temperature to an object of lower temperature
8.
The ability to do work is called
a)
energy
b)
thermal
c)
kinetic
d)
potential
9.
Mechanical energy can be either potential or ________.
a)
Motion
b)
Kinetic
c)
Chemical
d)
Light
10.
Which position has the most kinetic energy?
a)
A
b)
G
c)
D
d)
B
11.
Which position has the most potential energy?
a)
A
b)
G
c)
C
d)
D
12.
Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4,000 N. Mr. P's class pulled to the left with a force of 5,000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?
a)
4100 J
b)
3100 J
c)
5100 J
d)
8100 J
13.
A pendulum is released from point C. Which statement is correct as it swings from C to A?
a)
The PE increases and KE decreases
b)
The KE increases and PE decreases.
c)
The PE is maximum at A.
d)
The KE is maximum at C and B.
14.
Which of the following is an example of a transformation of potential energy to kinetic energy?
a)
a truck slowing down
b)
a car climbing up a hill
c)
an airplane traveling at constant speed
d)
falling object
15.
How much work is done carrying a 10-N box horizontally across a floor for 8 m?
a)
80 J
b)
10 J
c)
8 J
d)
0 J
16.
Which of the following is the best example of work being done?
a)
You lift a heavy box off the floor
b)
You stand still holding a heavy box
c)
Work is being done in both lifting and holding a heavy box
d)
No work is being done for either lifting nor holding a heavy box
17.
You do work against gravity when you walk up some stairs.
a)
True
b)
False
18.
You do work when you glide (not pushing) across the ice while ice skating.
a)
True
b)
False
19.
Which are correct units for work?
a)
N x s
b)
N x m
c)
J
d)
J/s
e)
W
20.
Which are correct units for power?
a)
N x s
b)
N x m
c)
J
d)
J/s
e)
W
21.
How are work and energy related?
a)
The work done by an external force acting on an object causes a change in the mechanical energy of the object.
b)
Work is the same thing as energy. They are equal.
c)
Energy is m*g*h, and work is 1/2*m*v2
22.
A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?
a)
2000 Joules
b)
19,600 Joules
c)
19,600 m/s
d)
31.3 m/s
23.
When my velocity triples, my kinetic energy increases by ______ times.
a)
9
b)
3
c)
1.5
d)
4.5
24.
When a 65 kg skydiver jumps from a plane, her speed steadily increases until air resistance provides a force that balances the force due to free fall. How fast is the skydiver falling if her kinetic energy at the moment is 704000J?
a)
21661.53 m/s
b)
147.17 m/s
c)
22880.0 km/s
d)
10830.76 m/s
25.
At which point(s) on the roller coaster is the kinetic energy at its maximum?
a)
A
b)
B
c)
C
d)
D
26.
Energy stored in a compressed spring is
a)
kx
b)
kx2
c)
1/2 kx2
d)
mgh
100 %
