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Work and Simple Machines Review

Total questions: 70

Worksheet time: 2hrs 35mins

Name
Class
Date
1.
What is the scientific definition of work?
a)
Thinking hard about something. 
b)
Using force to move an object. 
c)
Making money.
d)
Listening to music.
2.
True or False: As a man pushes a refrigerator up a ramp, work is done.
a)
True
b)
False
3.
True or False: A man would do more work if he pushes a box up a ramp faster.
a)
True
b)
False
4.
A girl LIFTS a bag. 
a)
Work
b)
No Work
5.
A boy HOLDS a book.
a)
Work
b)
No Work
6.
A man SITS on a box
a)
Work
b)
No Work
7.
A woman WAITS for her dog to urinate.
a)
Work
b)
No Work
8.
A boy KICKS a soccer ball.
a)
Work
b)
No Work
9.
A girl SWIMS.
a)
Work
b)
No Work
10.
A student SPRINTS across the field. 
a)
Work
b)
No Work
11.

Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?

a)

2.0 J

b)

200 J

c)

30 J

12.

Work is measured in

a)

kilograms

b)

Newtons

c)

meters

d)

Joules

13.

In order for work to happen a force must be applied and:

a)

The object must move in the same direction as the force.

b)

The object must move in the opposite direction as the force.

c)

The force must be less that the object being moved.

d)

The direction has no bearing on the force.

14.

When a box is moved up a ramp into a truck, the amount of work done depends on:

a)

The steepness of the ramp.

b)

The distance from the end of the ramp to the truck.

c)

The mass of the box.

d)

The distance the box is from the ground to the truck.

15.

Work or no work?

a)

work is being done

b)

work is NOT being done

16.

Work or no work?

a)

work is being done

b)

work is NOT being done

17.

Work or no work?

a)

work is being done

b)

work is NOT being done

18.

Work or no work?

a)

work is being done

b)

work is NOT being done

19.

Which of these are measurements of power?

a)
100 joules
b)
100 watts
c)

100 joules/second

d)
100 hertz
20.
Which of the following is true about work?
a)
It measures how quickly an object accelerates
b)
It measures how much effort is applied over a distance.
c)
It measures the change of an object's rate of speed.
d)
It measures how much time it takes to move an object.
21.
What units do we use to measure work?
a)
watts
b)
newtons
c)
joules
d)
meters
22.
How do you know when a force has been applied to an object?
a)
It moves.
b)
It flies.
c)
It accelerates.
d)
It gets bigger.
23.
What is the equation for calculating power?
a)
distance / time
b)
work x time
c)
work / time
d)
force x distance
24.
In which of these cases is work being done? 
a)
A student sleeps all night.
b)
A student pushes a locked door that does not move.
c)
A student carries his chair into another room.
d)
A student sits on the carpet.
25.
A 500N block is lifted 10 m. How much work was done?
a)
5000 J
b)
500 J
c)
50 J
d)
5 J
26.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
27.
Which of the following is a true statement about work?
a)
It measures how quickly an object accelerates 
b)
It measures how much effort is applied over a certain distance
c)
It measures the change in an object's rate of speed
d)
It measures how much time it takes to move a massive object
28.
What does one newton exerted over a distance of one meter equal?
a)
One watt
b)
One hertz
c)
One volt 
d)
One joule 
29.
Simple machines 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 
30.
Which of these is a measure of force?
a)
100 newtons
b)
100 meters per second
c)
100 joules
d)
100 watts
31.
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
32.
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
33.
The unit of power is the...
a)
work
b)
watt
34.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
35.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
36.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
change the direction of the applied force
d)
all of the above
37.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
38.
An inclined plane wrapped around a rod forms this simple machine 
a)
lever
b)
pulley
c)
screw
d)
wedge 
39.
An axe is an example of a
a)
pulley
b)
inclined plane
c)
screw
d)
wedge 
40.
A seesaw is an example of a  
a)
wedge
b)
lever 
c)
inclined plane 
d)
pulley 
41.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
42.
What type of simple machine is this?
a)
wheel and axle
b)
gear
c)
lever
d)
inclined plane
43.
The transfer of energy that occurs when a force makes an object move is known as 
a)
effort
b)
potential 
c)
kinetic 
d)
work 
44.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.  
a)
wedge
b)
screw
c)
lever
d)
inclined plane 
45.
Name this simple machine.
a)

Lever

b)

Wedge

c)

Pulley

d)

Inclined Plane

46.
How does a pulley make work easier? 
a)

It changes the direction of the input force.

b)

It changes the distance over which the input force is applied.

c)

It changes the amount of the input force applied 

d)

It changes direction and increases the effect of your input force

47.
This picture is an example of a _________.
a)
pulley
b)
wedge
c)
wheel and axle
d)
screw
48.
What simple machine can be used to split things apart and also it can hold open a door?
a)
Lever
b)
Pulley
c)
Wedge
d)
Screw
49.

How can simple machines make work easier?

a)

by decreasing the force needed to complete the task

b)

by increasing the friction between the machine and the object

c)

by adding more work on the object than originally applied

d)

by removing the force of gravity on the object

50.

Simple machines can make work easier by reducing the input force needed to move an object. However, there is a trade off for decreased input. What is the trade off?

a)

The distance the object is moved is increased.

b)

The distance the object is moved is decreased.

c)

The amount of work is increased.

d)

The amount of work is decreased.

51.

A doorknob is an example of a _______.

a)

wheel and axle

b)

inclined plane

c)

pulley

d)

wedge

52.
Which type simple machine would the base of a light bulb be?
a)
screw
b)
wedge
c)
wheel and axle
d)
pulley
53.

An example of a lever is a ________.

a)

doorstop

b)

drill

c)

staircase

d)

hammer

54.

The fixed point around which a lever rotates is know as the

a)

wheel.

b)

fulcrum.

c)

input force.

d)

output force.

55.

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

a)

inclined plane

b)

fulcrum

c)

wedge

d)

lever

56.

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

a)

inclined plane

b)

fulcrum

c)

force

d)

lever

57.

Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground?

a)

pulley

b)

screw

c)

wedge

d)

lever

58.

A doorknob is a simple machine made up of 2 circular objects of different sizes. When turning a doorknob, what type of simple machine is being used?

a)

inclined plane

b)

wheel and axle

c)

wedge

d)

pulley

59.

The bow or front of a boat splits the water as the boat moves. What kind of simple machine would the bow of the boat be?

a)

wedge

b)

screw

c)

ramp

d)

lever

60.

Using the back of a hammer makes it much easier to remove a nail from a wooden board. What kind of simple machine would the hammer be classified as if you are using it for this purpose?

a)

Wedge

b)

Lever

c)

Pullye

d)

Inclined Plane

61.

Which of the following is NOT an example of the simple machine know as a screw?

a)

the lid of a jar

b)

a bolt

c)

a drill bit

d)

a crowbar

62.

Workers push a heavy box up an inclined plane and onto a moving truck. Which best explains why these workers use an inclined plane?

a)

It makes their work easier because it requires less effort.

b)

It decreases the amount of work they have to do.

c)

It increases the amount of friction necessary to do the task.

d)

It makes the box weigh less.

63.

What simple machine is in this image

a)

Wedge

b)

Lever

c)

screw

d)

wheel and axel

e)

Incline plane

64.

A simple machine made of a plank and fulcrum

a)

pulley

b)

lever

c)

wheel & axel

d)

Incline plane

e)

wedge

65.

What simple machine is in this image

a)

Wedge

b)

Lever

c)

screw

d)

wheel and axel

e)

pulley

66.

A simple machine which is uses a turning motion to tighten or make holes

a)

pulley

b)

lever

c)

wheel & axel

d)

screw

e)

wedge

67.

What simple machines are in this image

a)

Wedge and pulley

b)

Lever and wheel/axel

c)

screw

d)

incline plane

e)

none of the above

68.
_________ is an example of a lever.
a)
Hammer
b)
Crowbar
c)
Wheelbarrow
d)
All of the above
69.
What type of simple machines does the photo show?
a)
Lever and wedge
b)
Inclined Plane and lever
c)
Pulley and wedge
d)
Lever and screw
70.
The greatest amount of force is required to move the metal block up which inclined plane?
a)
A
b)
B
c)
C
d)
D

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