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WorksheetsEnergy + Power Review
Total questions: 49
Worksheet time: 1hrs 3mins
Name
Class
Date
1.
_________ energy = energy of motion
a)
Kinetic
b)
Gravitational
c)
Mechanical
d)
Electrical
2.
What energy is NOT present in a firecracker?
a)
Chemical
b)
Thermal
c)
Sound
d)
Electrical
3.
A bouncy ball never bounces as high as where it started. This is because ______ energy is lost.
a)
Kinetic
b)
Gravitational
c)
Mechanical
d)
Sound
4.
A moving skateboard
a)
Potential
b)
Kinetic
5.
A microphone turns ________ energy into electrical energy.
a)
Sound
b)
Mechancial
c)
Kinetic
d)
Solar
6.
______ energy = energy of objects that can stretch
(rubber bands, slinkies, ...)
(rubber bands, slinkies, ...)
a)
Elastic
b)
Mechanical
c)
Kinetic
d)
Chemical
7.
What kind of energy is represented in this picture?
a)
Thermal
b)
Potential
c)
Nuclear
d)
Mechanical
8.
Electrical Energy is transferred to _____ Energy.
a)
Thermal
b)
Solar
c)
Electrical
d)
None
9.
What kind of energy does this device use?
a)
Chemical
b)
Electrical
c)
Thermal
d)
Chemical
10.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
11.
A battery converts what type of energy to another?
a)
sound to kinetic
b)
light to heat
c)
mechanical to electrical
d)
chemical to electrical
12.
Which kind of energy change occurs when a candle is burning?
a)
Chemical to light
b)
Light to electrical
c)
Solar to heat
d)
Chemical to electrical
13.
Wind turbines and windmills convert what energy to another?
a)
Kinetic to electric
b)
Gravitational potential to electric
c)
Mechanical to potential
d)
Thermal to sound
14.
The purpose of the panels is to change solar energy into ____________.
a)
light energy
b)
electrical energy
c)
chemical energy
d)
mechanical energy
15.
Electrical energy is changed to ______________ in light bulbs.
a)
light energy
b)
heat energy
c)
sound energy
d)
energy of motion
16.
Electrical energy is changed to __________ in radios and televisions.
a)
light energy
b)
heat energy
c)
sound energy
d)
energy of motion
17.
What is NOT a form of energy?
a)
plastic
b)
sound
c)
electrical
d)
light
18.
A rock at the edge of a cliff.
a)
Potential
b)
Kinetic
19.
Tarzan is swinging through the jungle looking for Jane. He is constantly moving back and forth.
His kinetic energy is being changed to ________ energy.
His kinetic energy is being changed to ________ energy.
a)
electrical
b)
chemical
c)
potenital
d)
nuclear
20.
What law tells us that energy cannot be created nor destroyed?
a)
Law of Conservation of Energy
b)
Law of Inertia
c)
Energy Law
d)
Newton's Law
21.
The Law of Conservation of Energy states that...
a)
energy can be destroyed
b)
energy can not be created or destroyed
c)
energy can only be destroyed using the force
22.
Roller coasters slow down because their energy disappears.
a)
True
b)
False
23.
A bowling ball can swing higher than it was dropped.
a)
True
b)
False
24.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
25.
Energy is usually transformed with 100% efficiency.
a)
True
b)
False
26.
What are the units of energy?
a)
Watts
b)
Joules
c)
Horsepower
d)
Newtons
27.
True or False: Weight is a Force
a)
true
b)
False
28.
Energy = ______ x distance
a)
Force
b)
Power
c)
time
d)
Joules
29.
You apply a force of 18 N to a dresser and move it 3.0 m. How much energy did you use to move the dresser?
E = F x d
E = F x d
a)
54 N
b)
6.0 J
c)
54 J
d)
27 J
30.
A 5000N block is lifted 10 m. How much energy was used?
E = F x d
E = F x d
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
31.
How much energy is used when a 350 N force is used to move a car 5 m?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
32.
A 5000 N block is lifted 10 m. How much energy was used?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
33.
How far does a car that weighs 5,000 N go if 18,000 J of energy is done on it?
E = F x d
E = F x d
a)
3.8 m
b)
3.7 m
c)
3.2 m
d)
3.6 m
34.
Power is ....
a)
the rate at which energy is used
b)
how far we push a mass
c)
force times distance
d)
the amount of work done
35.
Power = ____ / time
a)
Force
b)
distance
c)
Energy
d)
Watts
36.
What are the units of power?
a)
Joules
b)
Watts
c)
Newtons
d)
seconds
37.
E = 500 Joules
t = 25 seconds
P = ???
t = 25 seconds
P = ???
a)
0.05 W
b)
20 W
c)
12500 W
d)
2000 W
38.
How much time is needed to produce 720 Joules of energy if 90 watts of power is used?
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
39.
If 68 W of power is produced in 18 seconds, how much energy is used?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
40.
What is the average power generated by Peter Quill aka Star Lord (weight = 980 N) running up a flight of stairs rising vertically 6 .0 m in 5.0 s?
P=E / t
E=F x d
P=E / t
E=F x d
a)
0.03 W
b)
817 W
c)
1176 W
d)
1993 W
41.
Energy is ________ related to distance.
E = F x d
E = F x d
a)
directly
b)
indirectly
42.
Energy is ________ related to Force.
E = F x d
E = F x d
a)
directly
b)
indirectly
43.
Power is _________ related to energy.
P = E / t
P = E / t
a)
directly
b)
indirectly
44.
Power is _________ related to time.
P = E / t
P = E / t
a)
directly
b)
indirectly
45.
E = F x d
If I triple the force and double the distance, energy gets ____ times bigger.
If I triple the force and double the distance, energy gets ____ times bigger.
a)
5
b)
3
c)
2
d)
6
46.
E = F x d
If I halve the force, yet the energy is 4 times bigger, that means the distance is _____ times bigger.
If I halve the force, yet the energy is 4 times bigger, that means the distance is _____ times bigger.
a)
2
b)
4
c)
8
d)
10
47.
P = E / t
If I double the energy and quadruple the time, the power becomes ____ times what it originally was.
If I double the energy and quadruple the time, the power becomes ____ times what it originally was.
a)
4
b)
2
c)
1/2
d)
6
48.
I can normally lift 100 N 1 meter. If I double the energy I use, how much weight can I lift now?
a)
50 N
b)
100 N
c)
200 N
d)
400 N
49.
Sam (100 N) and Dean (200 N) race up a flight of stairs. How much faster than Dean does Sam need to run to be twice as powerful?
a)
2x as fast
b)
They can run the same speed
c)
4x as fast
d)
8x as fast
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