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WorksheetsWork, Power, and Energy
Total questions: 36
Worksheet time: 22mins
The ability to do work or cause change:
work
energy
momentum
power
Stored energy in the form of position or condition.
potential energy
kinetic energy
momentum
mechanical energy
What is needed to calculate work?
force
distance
time
mass
A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?
12 J
8 J
20 J
5 J
A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?
200 J
80 J
5 J
2000 J
A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?
18 m
4 m
10 m
6 m
What is mechanical energy?
total kinetic energy
the energy of motion
total kinetic and potential energy
temperature plus heat
Which of these items is not part of the law of conservation of energy?
energy cannot be created
energy cannot be destroyed
energy can be transferred between forms
energy is destroyed by friction
Where is the kinetic energy of pendulum at its highest?
at the top of the swing
at the bottom of the swing
at 1/4 of the swing
at 3/4 of the swing
What is needed calculate power?
work
time
mass
distance
At which point of this roller coaster is the energy 1/2 kinetic and 1/2 potential?
A
B
C
D
Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?
100 watts
400 watts
104 watts
50 watts
Potential energy is associated with ---.
speed
position
direction
temperature
Kinetic energy is associated with ---.
speed
position
direction
temperature
How does conservation of energy explain why something that is falling should speed up?
It gains kinetic energy because it gains potential energy.
It loses kinetic energy because no work was done on it.
It gains kinetic energy because it loses potential energy.
It loses kinetic energy because the Earth gains potential energy.
The equation for work is
work = power x mass
work = power / time
work = force x distance
work = distance x time
The equation for POWER is
power = mass x time
power = work / time
power = time / work
power = work x time
The unit for work (aka Newton-meter)
Watt
Power
Work
Joule
Energy cannot be ________ or ___________.
big/small
left/right
created/destroyed
made/transferred
If you hold a 20 N object 2 m off of the ground, how much work have you done?
40 J of Work
10 J of Work
No Work
18 J of Work
What is the kinetic energy of a 4 kg rock falling through the air at 5 m/s?
10 J
50 J
20 J
200 J
If a 2 kg ball is traveling at 4 meters per second, what is its kinetic energy?
1 J
2 J
4 J
8 J
16 J
Which point has the most kinetic energy?
Ball G
Ball F
Ball E
Ball D
Ball A
Energy is the rate at which work is done
True
False
What would your power output if you did 1200 Joules of work in 2 seconds?
2400 Joules
2400 Watts
600 Watts
600 Joules
If you were to push really hard on a brick wall, but the wall doesn’t move (distance = 0 m), are you still doing work?
No
Yes
If you hold your brother above your head for 10 seconds, have you done any work?
No
Yes
Which has a greater effect on the kinetic energy of an object, mass or velocity?
same effect for both
mass
velocity
