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KE, PE, Work and Power Test Review

Total questions: 81

Worksheet time: 3hrs 33mins

Name
Class
Date
1.

Gravitational potential energy depends on the ________ and ________ of the object.

a)

Mass and height

b)

Friction and acceleration

c)

Mass and gravity

d)

Height and Friction

2.

Which two factors affect an object's kinetic energy?

a)

area and volume

b)

mass and weight

c)

weight and height

d)

mass and speed

3.

Which point represents maximum potential energy? 

a)

W

b)

X

c)

Y

d)

Z

4.

As you go up a hill…

a)

Potential energy increases and kinetic energy decreases 

b)

Potential energy will remain constant

c)

Kinetic energy increases and potential energy decreases

d)

Kinetic energy will remain constant

5.

What is the gravitational potential energy (GPE) of a 1 kg book that is 1 m above the ground? (g=9.8 m/s2)

a)

9.8 J

b)

0.1 J

c)

1.0 J

d)

11.8 m/s2

6.

Calculate the gravitational potential energy of a 65 kg climber on top of Mount Everest (8.8 km high). (G=9.8m/s2)

a)

6864.3 J

b)

5605.6 J

c)

7206 J

d)

None of the answers are correct

7.

What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10 m/s?

a)

80 J

b)

3.2 J

c)

160 J

d)

40 J

8.

A rabbit of mass 3 kg walks at a hops at a speed of 0.5 m/s. Calculate its kinetic energy.

a)

0.5 J

b)

0.75 J

c)

0.255 J

d)

0.375 J

9.

When you do work, you are exerting

a)

push

b)

pull

c)

energy

d)

power

10.

The energy stored in an object is called

a)

Joule

b)

kinetic

c)

potential

d)

transformed

11.

The unit of measure for potential and kinetic energy is the

a)

Newton

b)

Meter

c)

Watt

d)

Joule

12.

Distance (height) and mass determine the amount of ________ energy in an object.

a)

kinetic

b)

potential

c)

solar

d)

thermal

13.

An object falling from 50m will have _______ potential than an object falling from 30m.

a)

greater

b)

less

c)

equal

d)

lower

14.

The amount of kinetic energy in an object is determined by its

a)

speed and mass

b)

height and mass

c)

speed and velocty

d)

height and velocity

15.

This type of energy is caused by motion

a)

kinetic

b)

potential

c)

solar

d)

electrical

16.

Which car has KE=100 and PE=0?

a)

A

b)

B

c)

C

d)

D

17.

Which car has KE=0 and PE=100?

a)

A

b)

B

c)

C

d)

D

18.

A basketball sits on the rim before falling into the hoop.

a)

Potential

b)

Kinetic

19.

A bobsled is moving at its fastest speed around the final turn.

a)

Potential

b)

Kinetic

20.

A diver just before she dives off the 30m platform.

a)

Potential

b)

Kinetic

21.

A golf ball as it gains height after being hit by the driver.

a)

Potential

b)

Kinetic

22.

A baseball just before being released by the pitcher.

a)

Potential

b)

Kinetic

23.

A swimmer in the middle of a 50 m race.

a)

Potential

b)

Kinetic

24.

What is the correct unit for energy?

a)

meters (m)

b)

kilogram meters per second (kg m/s)

c)

Newtons (N)

d)

Joules (J)

25.
The acceleration of an object due to gravity on Earth is...
a)
8.9 m/s2
b)
9.8 m/s2
c)
It depends on the mass of an object
d)
Equal to its kinetic energy
26.
The equation for potential energy. 
a)
PE = m + h
b)
PE = mh
c)
PE = mgh
d)
PE = gh
27.
The equation for kinetic energy. 
a)
KE = mv2
b)
KE = 1/2 mv2
c)
KE = mv
d)
KE = 1/2 mv
28.

When you are stretching a rubber band, you are storing __________ energy.

a)

Kinetic

b)

Potential

c)

Gravitational

d)

Spring

29.

Food is an example of:

a)

Chemical PE

b)

Gravitational PE

c)

Electrical PE

d)

Nuclear PE

e)

Elastic PE

30.

This is an example of:

a)

Chemical PE

b)

Gravitational PE

c)

Electrical PE

d)

Nuclear PE

e)

Elastic PE

31.

This is an example of:

a)

Chemical PE

b)

Gravitational PE

c)

Electrical PE

d)

Nuclear PE

e)

Elastic PE

32.

1/2 mass * velocity2 = ______

a)

kinetic energy

b)

potential energy

33.

mass * height * gravity = ______

a)

kinetic energy

b)

potential energy

34.
You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a speed of 30 m/s. What is the KE of the ball?
a)
900 J
b)
1800 J
c)
60 J
d)
30 J
35.
There is a bell at the top of a tower that is 45 m high. The bell weighs 100 kg. What is the potential energy of the bell?
a)
980 J
b)
441 J
c)
4,500 J
d)
44,100 J
36.
A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. What is the KE of the car?
a)
22,400 J
b)
44,800 J
c)
896,000 J
d)
1,792,000 J
37.

What is the correct unit for energy?

a)

meters (m)

b)

kilogram meters per second (kg m/s)

c)

Newtons (N)

d)

Joules (J)

38.

A skier is poised (waiting their turn) at the top of a steep slope ready to ski.

a)

GPE...Gravitational Potential Energy

b)

EPE...Elastic Potential Energy

c)

KE...Kinetic Energy

39.
A concrete dam holds back a large reservoir of water.
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
40.
An archer has pulled back the string of their bow and is ready to release the arrow at the distant target.
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
41.
A man swings an ax toward a log.
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
42.
A flower pot is falling from a windowsill. 
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
43.

A catapult is loaded with a ping pong ball and pulled back into position. It is ready to be launched.

a)

GPE...Gravitational Potential Energy

b)

EPE...Elastic Potential Energy

c)

KE...Kinetic Energy

44.
A fast-moving stream runs toward a mill.  It's a Bob Ross Painting!!
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
45.
A roller coaster has reached the top of the highest hill.
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
46.
A kid is about to let go of a yo-yo.
a)
GPE...Gravitational Potential Energy
b)
EPE...Elastic Potential Energy
c)
KE...Kinetic Energy
47.

Forces transfer _________.

a)

Atoms and Molecules

b)

Matter

c)

The dark side!

d)

Energy

48.

Formula of work:

a)

W = F x t

b)

W = F + t

c)

W = F / d

d)

W = F x d

49.

The Unit of force is ______________

a)

Kilogram (kg)

b)

Newton(N)

50.

The unit of distance is ___________

a)

meter (m)

b)

centimeter (cm)

c)

millimeter (mm)

51.

Units of work is ___________

a)

Newton (N)

b)

watt (w)

c)

joule (J)

52.

Power =

a)

Work + time

b)

Work / time

c)

Work x time

53.

Time is measured in ______________

a)

minutes (min)

b)

hours (hrs)

c)

seconds (s)

54.

Unit of power is:

a)

Meters (m)

b)

Watt (W)

c)

Joules (J)

55.

Mechanical Efficiency =

a)

"Output work" / "Input work"   x 1%

b)

"Output work" / "Input work"   x 10%

c)

"Output work" / "Input work"   x 100%

56.

Efficiency is always _____________

a)

less than 1%

b)

more than 100%

c)

less than 100

d)

less than 100%

57.

W-out will always be ______________

a)

less than W-in

b)

more than W-in

c)

less than W-out

58.

Efficiency is always less than 100%, why?

a)

Because of cold

b)

Because of heat

c)

Because of friction

d)

Because of the burning effect

59.

How can we increase efficiency?

a)

Reduce the cold

b)

Get more the friction

c)

Drive slower

d)

Reduce the friction

60.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
61.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
62.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
63.
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
a)
600 J 
b)
660 J
c)
900 J 
d)
1200 J 
64.

Work is done on an object when an applied force causes the object to move in the same direction as the force.

a)

agree

b)

disagree

65.

Power is the rate at which is done.

a)

agree

b)

disagree

66.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
67.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
68.
P=25 watts 
W=5000 Joules 
t=???
a)
200 sec
b)
0.0005 s
c)
125000 s
d)
125 s
69.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
70.

Power is measured in which units?

a)

Newtons

b)

Joules

c)

Watts

d)

Joule/sec

71.

A strongman exerts 1500 N on the side of a building. After 2 minutes, the building doesn't move. How much work did he do?

a)

180,000 J

b)

0 J

c)

750 J

d)

1500 J

72.

You use 950 J of energy to push a sofa. If it took you 5 sec to move the sofa, what was your power?

a)

190 J

b)

4750 J

c)

4750 W

d)

190 W

73.

A runner exerts 240,000 J when she runs for 10 min. What is the runner's power?

a)

400 W

b)

600 W

c)

400 J

d)

600 J

74.

A doorknob is an example of a _______.

a)

wheel and axle

b)

inclined plane

c)

pulley

d)

wedge

75.
Which type simple machine would the base of a light bulb be?
a)
screw
b)
wedge
c)
wheel and axle
d)
pulley
76.

A simple machine that splits an object apart is a _______.

a)

inclined plane

b)

fulcrum

c)

wedge

d)

lever

77.

A ramp is an example of a(n) _______.

a)

inclined plane

b)

fulcrum

c)

force

d)

lever

78.

Which of the following is NOT a complex machine?

a)

bicycle

b)

ramp

c)

can opener

d)

wheel barrow

79.

A complex machine is:

a)

the same as a single simple machine

b)

two simple machine only

c)

two or more simple machines

d)

four simple machine

80.

A tool with only a few parts that helps you do work is called a

a)

simple machine

b)

complex machine

c)

axle

d)

fulcrum

81.

Which one is the correct example of a pulley...?

a)
b)
c)
d)

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