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Work Power Machines and Energy 2026

Total questions: 89

Worksheet time: 5hrs 10mins

Name
Class
Date
1.

The equation for work is

a)

work = power x mass

b)

work = power / time

c)

work = force x distance

d)

work = distance x time

2.

The equation for POWER is

a)

power = mass x time

b)

power = work / time

c)

power = time / work

d)

power = work x time

3.

The unit for work is

a)

Watt

b)

J/s

c)

n*m

d)

N*s

4.

________________ is the rate at which work is done.

a)

Power

b)

Work

c)

Force

d)

Energy

5.

The unit of power:

a)

Joule

b)

N*m

c)

J/s

d)

Second

6.

How do you calculate power?

a)

P = t/W

b)

P = mgh

c)

P = w * t

d)

P = F*d/t

7.
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
8.
If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?
a)
272 m
b)
17 m
c)
4.05 m
d)
272 cm 
9.

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power?

a)

Person A

b)

Person B

10.

Which of the following would require the most power?

a)

A mass of 10 kilograms lifted 10 meters in 10 seconds

b)

A mass of 10 kilograms lifted 10 meters in 5 seconds

c)

A mass of 5 kilograms lifted 10 meters in 5 seconds

d)

A mass of 5 kilograms lifted 5 meters in 10 seconds

11.

A car uses 2,500 Joules in 25 seconds. How much power was exerted?

a)

62,500 W

b)

100 W

c)

62.5 W

d)

10 W

12.
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
13.

The boy pulls down on the rope for 1 meter, and the box rises by one meter. How does this machine help the boy to do work?

a)

by changing the direction of the applied force

b)

by reducing total work done

c)

by decreasing distance of the applied force

d)

by reducing the effort force

14.

Which ramp will require the least amount of effort force?

a)

A

b)

B

c)

C

d)

D

15.
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
a)
1
b)
10
c)
100
d)
1000
16.

Jeff is a landscaping contractor and lifts a rock weighing 600 newtons by wedging a board under the rock. Jeff weighs 150 newtons and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?

a)

0

b)

2

c)

4

d)

8

17.
A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?
a)
6 m
b)
16 m 
c)
80 m 
d)
1536 m 
18.

This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?
a)
500 N
b)
1000 N
c)
2000 N
d)
8000 N
19.

A lever us used to lift a box. In doing so, a 10 Newton effort force is required to lift a 10 kg box 0.2 meters above the ground. How far must you push the lever downward?

a)

0.5 m

b)

1 m

c)

1.5 m

d)

2 m

20.

Simple machines reduce the amount of work needed to complete a task. True or False?

a)

True

b)

False

21.

This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What is the MA of the system?

a)

1

b)

2

c)

4

d)

8

22.

Looking only at ramps C and D, which ramp will require the least amount of effort distance?

a)

A

b)

B

c)

C

d)

D

e)

C and D require the same amount of effort distance.

23.

Looking only at ramps C and D, which ramp will require the least amount of resistance distance?

a)

A

b)

B

c)

C

d)

D

e)

C and D require the same amount of resistance distance.

24.
What is the unit used to measure Power?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
25.
Force X Distance = _______?
a)
Work
b)
Power
c)
Energy
d)
Force
26.
If you use a crowbar to get the lid off of a bucket, what simple machine are you using?
a)
Inclined Plane
b)
Pulley
c)
Wheel and Axle
d)
Lever
27.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
28.
What is the unit used to measure work?
a)
Joule
b)
Watt
c)
Newton
d)
Pascal
29.

Which of these is an example of a wedge (an inclined plane that moves)?

a)

skateboard

b)

broom

c)

stairs

d)

butter knife

30.
Work/Time = ________?
a)
Force
b)
Speed
c)
Velocity
d)
Power
31.
Calculate the amount of work done if you use a 100N force to push a 50 kg box 5 m across the kitchen floor. 
a)
250 J 
b)
500 J
c)
5000 J
d)
50,000 J
32.
A watt is defined as ___________
a)
One joule per second
b)
One horsepower per second
c)
A force of one pound over a distance of one foot
d)
A force of one newton over a distance of one meter
33.

You have just designed a machine that uses 900 J of work from a motor for 480 J of useful work the machine supplies. What is the efficiency of your machine?

a)

53%

b)

100%

c)

83%

d)

43%

34.

What are the 6 simple machines we discussed in class?

a)

wheel, hammer, spiral, stump, spike, cube

b)

pulley, lever, wheel and axle, screw, inclined plane, wedge

c)

ramp, bolt, circuit, wheel, block, spiral

d)

wheel and socket, ramp, cube, screw, lever, spiral

35.

You test a machine and find it exerts a force of 45 N (resistance) for each 5 N of force you exert (effort) operating the machine. What is the Mechanical Advantage of the machine?

a)

10

b)

11

c)

9

d)

5

36.

Scissors are an example of which simple machine?

a)

screw and wedge

b)

pulley and screw

c)

pulley and wedge

d)

lever and wedge

37.

How much work is done when a crate is pushed with 50 N of force for a distance of 15m?

a)

750 J

b)

3 J

c)

65 J

d)

650 J

38.

You exert 640 J of work lifting a box in a time of 2 seconds. How much power is used to lift the box?

a)

642 W

b)

640 W

c)

1280 W

d)

320 W

39.

An axe is an example of which simple machine?

a)

Pulley

b)

Wedge

c)

Screw

d)

Inclined plane

40.
What does one newton exerted over a distance of one meter equal?
a)
One watt
b)
One hertz
c)
One volt 
d)
One joule 
41.
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 
42.

Simple machines usually make work easier by increasing what?

a)

The distance over which work is done

b)

The force needed to do work

c)

The time required to do work

d)

The acceleration of a massive object

43.
You move a 12-newton box up a 6-meter ramp. In order to find out how much power you created, what would you need to know?
a)
The mass of the box
b)
The slope of the ramp 
c)
The direction the box moved
d)
How long the task took
44.
You do 90 joules of work in 30 seconds. How much power have you generated?
a)
30 watts
b)
3 watts
c)
120 watts
d)
270 watts
45.
You move an 8-newton weight five meters in 4 seconds. How much power have you generated?
a)
160 watts
b)
10 watts
c)
6.4 watts
d)
17 watts
46.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
47.

The factor by which a simple machine makes doing work feel easier.

a)

Input Force

b)

Efficiency

c)

Mechanical Advantage

48.

This family of machines includes the Inclined Wedge and the Screw.

a)

The Inclined Plane Family

b)

The Lever Family

c)

The Cactus Shadows Family

49.
How can you decrease the effort force needed to push a weight to the top of the ramp? 
a)
cover the surface with carpet
b)
increase the length of the ramp
c)
increase the height of the ramp
d)
decrease the length of the ramp
50.

Bob (80 kg) uses 180 N of force to get him up the slope. The vertical distance is 2 m and the diagonal is 10 m. Calculate the work he does.

a)

1600 J

b)

160 J

c)

3600 J

d)

1800 J

51.

A weight-lifter raises a 2000N weight through a vertical height of 2.0m in 0.80s. What useful power does he develop in doing this?

a)

800 W

b)

700W

c)

4000W

d)

5000W

52.
If 68 W of power is produced in 18 seconds, how much work is done?
a)
1,224 J
b)
0.264 J
c)
3.77 J
d)
12.24 J
53.
What are the units for Power?
a)
Joules (J)
b)
Newtons (N)
c)
Watts (W)
d)
Seconds (s)
54.
Solve: 
distance = ?    
force = 3N
time = 60 s  
work = 225 J
a)
d = 75 m
b)
d = 180 m
55.
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
56.
True or false: when the distance an object moves is zero the work done on the object is also zero.  
a)
True
b)
False
57.

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

a)

Yes, work was done

b)

No, work wasn't done

58.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
59.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

60.

Calculate the amount of work done if you lift a 50 kg box 5 m.

a)

250 J

b)

2500 J

c)

5000 J

d)

50,000 J

61.

What period are you in?

a)

Period 2

b)

Period 3

c)

Period 4

d)

Period 5

e)

Period 6

62.
WHICH OF THESE DESCRIBES THE LAW OF CONSERVATION OF ENERGY?
a)
NO MACHINE IS 100% EFFICIENT
b)
ENERGY IS NEITHER CREATED OR DESTROYED
c)
THE ENERGY RESOURCES OF EARTH ARE LIMITED
d)
THE ENERGY OF A SYSTEM IS ALWAYS DECREASING
63.

AS A ROLLER COASTER MOVES DOWN A HILL, POTENTIAL ENERGY IS CONVERTED INTO KINETIC ENERGY. WHAT IS TRUE ABOUT THE TOTAL ENERGY OF THIS SYSTEM?

a)

ENERGY IS GAINED (CREATED) AS THE ROLLER COASTER MOVES

b)

ENERGY IS LOST (DESTROYED) AS THE ROLLER COASTER MOVES

c)

THE TOTAL ENERGY REMAINS THE SAME AS THE ROLLER COASTER MOVES

d)

THE TOTAL ENERGY CONSTANTLY CHANGES AS THE ROLLER COASTER MOVES

64.

What is potential energy?

a)

moving energy

b)

stored energy due to position

c)

energy due to motion

d)

mgh + 1/2 mv2

65.

What is kinetic energy?

a)

moving energy

b)

potential energy

c)

stored energy

d)

renewable energy

66.

At which point is potential energy greatest?

a)

W

b)

X

c)

Y

d)

Z

67.
At which point is kinetic energy greatest? 
a)
W
b)
X
c)
Y
d)
Z
68.

In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?

a)

120,000

b)

294,000

c)

176,400 J

d)

117,600 J

69.

1. A ball has a 17 J of kinetic energy and its total energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?

a)

0.25 m

b)

0.52 m

c)

5.2 m

d)

25 m

70.

Using this Picture for all of the next questions, please answer the following. How much PE is present at 100 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

71.

How much KE is present at 100 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

72.

How much PE is present at 30 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

73.

How much KE is present at 30 m?

a)

15,000 J

b)

20,000 J

c)

35,000 J

d)

50,000 J

e)

0 J

74.

How much KE is present at 60 m?

a)

15,000 J

b)

20,000 J

c)

30,000 J

d)

50,000 J

e)

0 J

75.

How much TE is present at 60 m?

a)

15,000 J

b)

20,000 J

c)

30,000 J

d)

50,000 J

e)

0 J

76.

Calculate the mass of the skier.

a)

about 500 kg

b)

about 50 kg

c)

about 1167 kg

d)

about 119 kg

77.

What do you notice about the TE throughout the whole ski jump?

a)

It is the same as the GPE

b)

It is the same as the KE

c)

It is always different

d)

It never changes

78.

Calculate the speed of the skier as they reach the bottom of the hill

a)

about 1373 m/s

b)

about 140 m/s

c)

about 37 m/s

d)

about 12 m/s

79.

How much kinetic energy (K) does a baseball with a mass of 0.143 kg have if it is travelling at a velocity of 41.1 m/s?

a)

120.8 joules

b)

89.7 joules

c)

108.3 joules

d)

156.6 joules

80.

A 1.0 kg ball is stationary at the top of a hill that is 10.0 meters in height. The ball rolls down the hill. What is its gravitational potential energy at the bottom of the hill?

a)

0 joules

b)

98 joules

c)

49 joules

d)

38 joules

81.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
82.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
83.
When a pendulum swings, at which point is potential energy at its greatest?
a)
1
b)
2
c)
3
d)
4
84.

If a 3.2 Kg hammer was dropped from a construction building from a height of 40 meters, and hit a worker on the head. What velocity did the hammer hit is head? The worker is 1.8 meters tall

a)

9.8 m/s

b)

27.6 m/s

c)

65.5 m/s

d)

50 m/s

85.

A pendulum is raised to a height and dropped. If the ball of the pendulum is .35 Kg and is traveling at 3.31 m/s at its lowest point, what was the height that it was dropped from

a)

1.92 m

b)

1.5 m

c)

.75 m

d)

.55 m

86.

The unit for energy is _____________.

a)
Joules
b)
kg
c)
m/s
d)
s
87.
A skateboarder travels from location 1 to location 4 as shown.  At which location does the skateboarder have the most kinetic energy and the least potential energy?
a)
1
b)
2
c)
3
d)
4
88.

A car going twice as fast has ____ times the kinetic energy.

a)

four

b)

six

c)

eight

d)

ten

89.
Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s.
a)
18 J
b)
36 J
c)
12 J
d)
6 J

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