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Work & Simple Machines Review

Total questions: 106

Worksheet time: 2hrs 24mins

Name
Class
Date
1.
How much work is produced when 350 N is used to move a car 5 m (W=Fd)?
a)
70 J
b)
1750 J
c)
355 J
d)
175 J
2.

What is a machine?

a)

an object that has Artificial Intelligence.

b)

an object that is designed to take over the earth in 2050.

c)

a device that changes force by reducing it over a larger distance.

d)

a mechanism that is used to decrease the amount of work done.

3.

What is mechanical advantage?

a)

The advantage a machine has over a bicycle

b)

A measure of how much a simple machine reduces work

c)

A measure of when is the best time to use a simple machine

d)

the number of times a machine increases input force

4.

What is effort (input) force?

a)

the force one exerts on a machine

b)

the force which an effort force must overcome in order to do work on an object via a simple machine.

c)

the force the machine exerts on a object

d)

the output work times the input distance

5.

What is resistance (output) force?

a)

the force required by a machine in order to accomplish work (the force you put on the machine)

b)

The force that is exerted by a machine

c)

the force the machine exerts on a object

d)

the output work times the input distance

6.

What is effort (input) distance?

a)

the force required by a machine in order to accomplish work (the force you put on the machine)

b)

the force which an effort force must overcome in order to do work on an object via a simple machine.

c)

the distance an input force acts through

d)

the output work times the input distance

7.
Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground (W=Fd).
a)
270 J
b)
2646 J
c)
333 J
d)
3.00X10-3 J
8.

What is resistance (output) distance?

a)

the force required by a machine in order to accomplish work (the force you put on the machine)

b)

the force which an effort force must overcome in order to do work on an object via a simple machine.

c)

the distance an input force moves a machine

d)

the distance through which the output force is exerted

9.
How can you determine the mechanical advantage of a pulley system?
a)
Count the number of rope/cable segments on each side of the pulleys, including the free end. If the free end is to be pulled down, subtract 1 from this number.
b)
Count the number of rope/cable segments on each side of the pulleys without including the free end.
c)
Count the number of rope/cable segments on the central pulleys.
d)
Count the number of rope/cable segments on each side of the pulleys, including the free end. If the free end is to be pulled down, subtract 10 from this number.
10.
If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?
a)
2N
b)
5N
c)
10N
d)
15N
11.

A box of weight W is lifted by a force F using a lever as shown below.

What is the mechanical advantage of the lever (MA=Input Distance/Output Distance)?

a)

0.5

b)

2

c)

3

d)

6

12.
What is the mechanical advantage of this pulley system?
a)
2
b)
3
c)
4
d)
5
13.

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 (MA=Output Force/Input Force)?

a)

1

b)

10

c)

100

d)

1000

14.

The mechanical advantage of this inclined plane is...(MA=Resistance Force/Effort Force)

a)

2.4

b)

3.4

c)

4.4

15.

exerting a force on an object that causes the object to move some distance

a)

work

b)

power

c)

mechanical advantage

d)

efficiency

16.

the amount of work you do when you exert one Newton of force to move the object one meter

a)

joule

b)

newton

c)

meter

d)

output force

17.

the rate at which work is done

a)

power

b)

work

c)

machine

d)

efficiency

18.

a device that allows you to do work in a way that is easier

a)

machine

b)

compound machine

c)

work

d)

power

19.

the force you exert on the machine

a)

input force

b)

output force

c)

efficiency

d)

mechanical advantage

20.

the force the machine exerts on an object

a)

input force

b)

output force

c)

efficiency

d)

mechanical advantage

21.

the ratio of output force to input force

a)

work

b)

mechanical advantage

c)

efficiency

d)

power

22.

the percentage of the input work that is converted to output work

a)

mechanical advantage

b)

efficiency

c)

joule

d)

machine

23.

a simple machine that is a flat, sloped surface

a)

inclined plane

b)

wedge

c)

lever

d)

fulcrum

24.

a device that is thick at one end and tapers to a thin edge at the other end

a)

wedge

b)

inclined plane

c)

lever

d)

fulcrum

25.

a rigid bar that is free to pivot, or rotate, on a fixed point

a)

wedge

b)

inclined plane

c)

lever

d)

fulcrum

26.

the fixed point that a lever pivots around

a)

wedge

b)

inclined plane

c)

lever

d)

fulcrum

27.

a simple machine that acts like an inclined plane wrapped around a cylinder

a)

screw

b)

pulley

c)

fulcrum

d)

compound machine

28.

a simple machine made of two circular or cylindrical objects fastened together that rotate about a common axis

a)

wheel and axle

b)

pulley

c)

screw

d)

compound machine

29.

a simple machine made of a grooved wheel with a rope or cable wrapped around it

a)

pulley

b)

wheel and axle

c)

screw

d)

lever

30.

a machine that utilizes two or more simple machines

a)

compound machine

b)

machine

c)

wedge

d)

screw

31.
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
32.
What does one newton exerted over a distance of one meter equal?
a)
One watt
b)
One hertz
c)
One volt 
d)
One joule 
33.
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 
34.
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 
35.
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 
36.
Which of these is a measure of force?
a)
100 newtons
b)
100 meters per second
c)
100 joules
d)
100 watts
37.
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
38.
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
39.
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
40.
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
41.
How can the lever be balanced?
a)
add weight to the right side
b)
move the fulcrum right
c)
move the heavier weight back
42.
A knife is an example of a (an)
a)
inclined plane
b)
wedge
c)
ramp
d)
pulley
43.
All of these are examples of a wheel and axle except:
a)
pizza cutter
b)
doorknob
c)
windmill
d)
lever
44.
In this illustration,
a)
the machine is decreasing mechanical advantage
b)
the machine is increasing mechanical advantage
c)
mechanical advantage is not changed
45.
To increase the mechanical advantage of a lever
a)
make sure the fulcrum is in the middle of the lever
b)
move the fulcrum closer to the load
c)
move the fulcrum closer to the effort
d)
use a bigger fulcrum
46.

A simple machine usually used to raise a flag is a (an)

a)

inclined plane

b)

pulley

c)

lever

d)

wheel and axle

47.
A push or pull is a 
a)
load
b)
fulcrum
c)
force
d)
work
48.
An object being lifted or moved is a
a)
load
b)
fulcrum
c)
force
d)
work
49.
________________ is done whenever a force moves an object a distance
a)
load
b)
friction
c)
force
d)
work
50.
A ramp is an example of a(n)
a)
inclined plane
b)
fulcrum
c)
force
d)
lever
51.
A simple machine that splits an object apart is a
a)
inclined plane
b)
fulcrum
c)
wedge
d)
lever
52.

An example of a lever is

a)

doorstop

b)

drill

c)

staircase

d)

hammer

53.
A lever turns back and forth on a
a)
effort
b)
load
c)
work
d)
fulcrum
54.
Which type simple machine would the base of a light bulb be?
a)
screw
b)
wedge
c)
wheel and axle
d)
pulley
55.
A doorknob is an example of a
a)
wheel and axle
b)
inclined plane
c)
pulley
d)
wedge
56.
Which of the following is true for the picture?
a)
elephant is the fulcrum, mouse is the effort, triangle is the load
b)
mouse is the fulcrum, triangle is the effort, elephant is the load
c)
triangle is the fulcrum, mouse is the effort, elephant is the load
57.
A simple machine that is actually a kind of inclined plane is a
a)
wedge
b)
pulley
c)
gear
d)
lever
58.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
59.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
60.
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
61.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
62.
The device used to raise a flag up a flag pole is an example of a 
a)
wheel and axle 
b)
lever
c)
inclined plane 
d)
pulley 
63.
An inclined plane wrapped around a rod forms this simple machine 
a)
lever
b)
pulley
c)
screw
d)
wedge 
64.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum 
65.
A seesaw is an example of a  
a)
wedge
b)
lever 
c)
inclined plane 
d)
pulley 
66.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
67.
The fixed point on the lever is called 
a)
load
b)
resistance
c)
bar
d)
fulcrum
68.
Name this simple machine. 
a)
Pulley
b)
Wheel and Axle
c)
Inclined Plane
d)
Lever
69.
Name this simple machine. 
a)
Wheel and Axle
b)
Lever
c)
Pulley
d)
Wedge
70.
What is effort (input) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
71.
What is resistance (output) force?
a)
the force required by a machine in order to accomplish work (the force you put on the machine)
b)
the force which an effort force must overcome in order to do work on an object via a simple machine.
c)
the force the machine exerts on a object
d)
the output work times the input distance
72.
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
73.
The mechanical advantage of this inclined plane is.....
a)
2.4
b)
3.4
c)
4.4
74.

A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?

a)

1

b)

2.5

c)

5

d)

10

75.

What is the mechanical advantage of a lever that has an input arm of 3 meters and an output arm of 2 meters?

a)

1.5

b)

1

c)

0.67

d)

3

76.

A lever with an input arm of 2 meters has a mechanical advantage of 4. What is the output arm’s length?

a)

2

b)

4

c)

6

d)

8

77.

A lever with an output arm of 0.8 meter has a mechanical advantage of 6. What is the length of the input arm?

a)

2

b)

4

c)

6

d)

8

78.

A rake is held so that its input arm is 0.4 meters and its output arm is 1.0 meters. What is the mechanical advantage of the rake?

a)

0.4

b)

1

c)

1.4

d)

2

79.

A broom with an input arm length of 0.4 meters has a mechanical advantage of 0.5. What is the length of the output arm?

a)

2

b)

1.5

c)

1

d)

0.5

80.

A child’s toy rake is held so that its output arm is 0.75 meters. If the mechanical advantage is 0.33, what is the input arm length?

a)

0.75

b)

0.33

c)

0.2475

d)

0.6

81.

A 5-meter ramp lifts objects to a height of 0.75 meters. What is the mechanical advantage of the ramp?

a)

6.67

b)

5.67

c)

5

d)

6

82.

A 10-meter long ramp has a mechanical advantage of 5. What is the height of the ramp?

a)

2

b)

5

c)

10

d)

20

83.

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters. How long is the ramp?

a)

2

b)

4

c)

6

d)

8

84.

A child makes a ramp to push his toy dump truck up to his sandbox. If he uses 5 newtons of force to push the 12-newton truck up the ramp, what is the mechanical advantage of his ramp?

a)

1.2

b)

2.4

c)

3.6

d)

4.8

85.

A ramp with a mechanical advantage of 6 is used to move a 36-newton load. What input force is needed to push the load up the ramp?

a)

2

b)

4

c)

6

d)

8

86.

Gina wheels her wheelchair up a ramp using a force of 80 newtons. If the ramp has a mechanical advantage of 7, what is the output force (in newtons)?

a)

17

b)

7

c)

10

d)

8

87.

A mover uses a ramp to pull a 1000-newton cart up to the floor of his truck (0.8 meters high). If it takes a force of 200 newtons to pull the cart, what is the length of the ramp?

a)

10

b)

5

c)

200

d)

500

88.

A simple machine that consists a rigid bar that pivots on a fixed point

a)

lever

b)

pulley

c)

wheel and axle

d)

fulcrum

89.

An axe is an example of a

a)

pulley

b)

inclined plane

c)

screw

d)

wedge

90.

A seesaw is an example of a

a)

wedge

b)

lever

c)

inclined plane

d)

pulley

91.

The fixed point on the lever is called

a)

load

b)

resistance

c)

bar

d)

fulcrum

92.

When force is used to move an object across a distance, this is called...

a)

effort

b)

power

c)

energy

d)

work

93.

The device used to raise a flag up a flag pole is an example of a

a)

wheel and axle

b)

lever

c)

inclined plane

d)

pulley

94.
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
95.
Name this simple machine.
a)
Lever
b)
Wedge
c)
Pulley
d)
Inclined Plane
96.
Name this simple machine. 
a)
Wheel and Axle
b)
Lever
c)
Pulley
d)
Wedge
97.
Name this simple machine. 
a)
Wheel and Axle
b)
Lever
c)
Pulley
d)
Wedge
98.
Which choice is an example of a lever?
a)
Axe
b)
Seesaw
c)
Bottle Cap
d)
Tunnel
99.

work is equal to _____________ multiplied by distance

a)

power

b)

friction

c)

force

d)

acceleration

100.

A simple machine that splits an object apart is a

a)

inclined plane

b)

fulcrum

c)

wedge

d)

lever

101.

All of these are examples of a wheel and axle except:

a)

pizza cutter

b)

doorknob

c)

windmill

d)

pulley

102.

How can you reduce the amount of force required to lift an object using an inclined plane (ramp)?

a)

increase the length of the ramp

b)

increase the height of the ramp

c)

decrease the length of the ramp

103.

How much work is done if I use 5N of force to move an object 2 meters?

a)

10 Newtons

b)

7 Newtons

c)

10 Joules

d)

7 Joules

104.

What do you call a machine made up of two or more simple machines?

a)

complicated machine

b)

compound machine

c)

comprehensive machine

d)

constructed machine

105.

A lever is designed to:

a)

decrease the amount of force required to do work

b)

decrease the amount of time required to do work

c)

increase the amount of energy needed to work

d)

decrease the amount of work done

106.

A simple machine that is made up of an incline plane wrapped around a cylinder, often used to hold things together is a...

a)

lever

b)

screw

c)

wedge

d)

pulley

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