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Simple Machines, Work & Power

Total questions: 100

Worksheet time: 3hrs 55mins

Name
Class
Date
1.

How many simple machines are there?

a)

2

b)

4

c)

6

d)

8

2.
Name this simple machine.
a)
Lever
b)
Wedge
c)
Pulley
d)
Inclined Plane
3.
Name this simple machine. 
a)
Pulley
b)
Wheel and Axle
c)
Inclined Plane
d)
Lever
4.
Name this simple machine. 
a)
Inclined Plane
b)
Lever
c)
Pulley
d)
Wedge
5.
Which choice is an example of a pulley?
a)
Axe
b)
Seesaw
c)
Crane 
d)
Tunnel
6.
Which choice is an example of an inclined plane?
a)
A ramp
b)
Seesaw
c)
Bottle Cap
d)
Ferris Wheel 
7.
The fixed point on the lever is called 
a)
load
b)
resistance
c)
bar
d)
fulcrum
8.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
9.
A _____ is a fixed bar that is free to move around a fixed point known as a fulcrum.
a)
pulley
b)
inclined plane
c)
lever
10.
A ______ is a grooved wheel with a rope running along the groove.
a)
lever
b)
pulley
c)
screw
11.
A lever is designed to:
a)
reduce the amount of force required to do work
b)
increase the amount of effort required
c)
increase the amount of energy needed to work
12.
A(n) __________ is a push or pull.
a)
newton
b)
acceleration
c)
force
d)
momentum
13.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
14.
A wheelbarrow is an example of
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
d)
Fourth Class Lever
15.
In a first class lever, the _____ is in the middle.
a)
Effort
b)
Fulcrum
c)
Load
d)
Machine
16.
In a second class lever, the ______ is in the middle.
a)
Effort
b)
Fulcrum
c)
Load
d)
Machine
17.
In third class levers, the ______ is in the middle. 
a)
Effort
b)
Fulcrum
c)
Load
18.
Which simple machine is really a modified version of the inclined plane?
a)
Pulley
b)
Lever
c)
Wedge
d)
I don't know
19.
The flag pole mechanism is an example of which simple machine? 
a)
Inclined Plane
b)
Lever
c)
Wedge
d)
Pulley
20.
Which of the following does a simple machine NOT do?
a)
Increase the force applied
b)
Increase the distance the force is applied over
c)
Change the direction the force is applied
d)
Change the amount of work that needs to be done
21.
Which of these is not part of the lever?
a)
Object
b)
Fulcrum
c)
Load
d)
Lever
22.
Simple machines allow us to do less work.
a)
TRUE
b)
FALSE
23.
The force placed on the simple machine to move the load is called the ____.
a)
Effort
b)
Fulcrum
c)
Load
d)
Lever
24.
Simple machines make the work we have to do easier, but it is still the same amount of work.
a)
TRUE
b)
FALSE
25.
A simple machine used to push two objects apart.
a)
Lever
b)
Inclined Plane
c)
Wedge
d)
Screw
26.
A door stop is an example of a
a)
Screw
b)
Wedge
c)
Lever
d)
Inclined Plane
27.
The two forces applied on a pulley are
a)
Effort Force and Resistance Force
b)
Effort and Load
28.
This is an example of what simple machine?
a)
pulley
b)
wedge
c)
inclined plane
d)
lever
29.
This is an example of what simple machine?
a)
wheel and axle
b)
wedge
c)
pulley
d)
screw
30.
This is an example of what simple machine?
a)
pulley
b)
lever
c)
screw
d)
inlined plane
31.
This is an example of what simple machine?
a)
wedge
b)
screw
c)
inclined plane
d)
pulley
32.
This is an example of what simple machine?
a)
screw
b)
wheel and axle
c)
pulley
d)
wedge
33.
This is an example of what simple machine?
a)
pulley
b)
wedge
c)
inlined plane
d)
screw
34.
The man is using which simple machine to enable him to lift 200 km?
a)
wheel and axle
b)
pulley
c)
wedge
d)
screw
35.
A playground slide is an example of which simple machine?
a)
pulley
b)
wedge
c)
inclined plane
d)
screw
36.
The man is using which simple machine to enable him to lift this heavy weight?
a)
pulley
b)
wedge
c)
wheel and axle
d)
lever
37.
The boy is able to move his heavy load by using which simple machine?
a)
lever
b)
screw
c)
inclined plane
d)
wheel and axle
38.
This mouse is using which simple machine to chop down a tree?
a)
wheel and axle
b)
wedge
c)
inclined plane
d)
pulley
39.

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

40.

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

a)

pizza cutter

b)

doorknob

c)

windmill

d)

pulley

41.

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

42.

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

43.

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

44.
Which is not a type of simple machines?
a)
spring
b)
screw
c)
pulley
d)
wedge
45.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
screw
d)
wheel and axle
46.
What type of simple machine is found on the floor of a bathtub?
a)
screw
b)
inclined plane
c)
wedge
d)
pulley
47.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
butter knife
48.
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 puchses a stroller up a ramp into a building
d)
a girl eats a sandwich
49.
Which is a characteristic of simple machines?
a)
they run on electricity
b)
they take a long time to make
c)
they have few or not moving parts
d)
they are not very large
50.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
51.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
52.
Josh is pushing wood in a wheelbarrow. What 3 simple machines are in use?
a)
inclined plane, screw, pulley
b)
inclined plane, lever, wheel and axle 
c)
inclined plane, screw, wheel and axle
d)
inclined plane, wheel and axle, pulley
53.
What are the simple machine parts in a bicycle?
a)
wheel, blade, chain
b)
chain and pedals
c)
lever, chain, pedals
d)
chain, pedals, wheel 
54.
What are the simple machine parts in a blender?
a)
wheel, blade, chain
b)
blade, lid
c)
lid and chain
d)
wheel and lid
55.

Which of these bests describes why your weight (on Earth) would change on another planet?

a)

Weight does not change, no matter where you are.

b)

Different planets have different gravitational pulls.

c)

In general, the smaller the planet, the greater weight.

d)

Dehydration effects on different planets change weight.

56.

"The force that pulls objects toward each other" is the definition for which term?

a)

motion

b)

friction

c)

energy

d)

gravity

57.

Which statement is true about your mass?

a)

You would have less mass on the moon.

b)

You would have more mass on Earth.

c)

You would have less mass on Earth.

d)

You would have the same mass on the moon and Earth.

58.

What is the relationship between the weight of a cellphone and its mass (0.26 kg)?

a)

The weight is the product (multiplication) of the mass and acceleration due to gravity, wherever it is located.

b)

The weight and mass are independent of one another and solely dependent upon location.

c)

The weight is the mass divided by the acceleration due to gravity

d)

The weight is the mass multiplied by ten.

59.

How much work is accomplished by moving a 600 N crate 7 m?

a)

4,200 J

b)

85.7 J

c)

0.001 J

d)

9,800 J

60.

Hail stones do a lot of damage when they fall to the Earth and hit homes and cars with great force. They hit with great force because they

a)

melt as they fall to Earth.

b)

are made of ice.

c)

accelerate as they fall to Earth.

d)

have a huge mass compared to other falling objects.

61.

When Jackson throws a tennis ball in a straight path, what two forces cause the ball to eventually stop moving?

a)

mass and ground force

b)

gravity and friction

c)

wind resistance and mass

d)

negative acceleration and gravity

62.

For work to be done on an object,

a)

some force need only be exerted on the object.

b)

the object must move some distance as a result of a force.

c)

the object must move, whether or not a force is exerted on it

d)

the object must not move.

63.

If you exert a force of 20 newtons to push a desk 10 meters, how much work do you do on the desk?

a)

200 J

b)

30 J

c)

10 J

d)

100 J

64.

Work is measured in

a)

meters.

b)

pounds.

c)

newtons.

d)

joules.

65.

A catapult is an example of a _________ .

a)

lever

b)

wheel and axle

c)

screw

d)

inclined plane

66.

units of force are

a)

newtons

b)

grams

c)

joules

d)

meters

67.

units for work are

a)

newtons

b)

joules

c)

meters

d)

seconds

68.

if you push a cart with a force of 60 N for 2 m... how much work have you done

a)

120 J

b)

30 J

c)

120 N

d)

30 N

69.
What is the formula for work?
a)
Force = work x distance
b)
Distance = force x work
c)
Work = force x distance
d)
Work = force x mass
70.

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

a)

25J

b)

100J

c)

4J

d)

75J

71.

If 40N of force is applied to Rollo Koster's 10 kg cart over a distance of 50 meters, how much work is done?

a)

8000J

b)

8000N

c)

4000J

d)

2000J

72.
Energy can not be created or destroyed, only converted from one form to another.
a)
true
b)
false
73.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
74.
Which situation is work not done?
a)
lifting a 20 pound box off the floor
b)
holding a 20 pound box above the floor
c)
sliding a 20 pound box across the floor
d)
sliding a 20 pound box up an inclined plane
75.
Which of the following is the best example of work being done? 
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
76.

A machine with a 5-N input force and a 25-N output force has a mechanical advantage of?

a)

2

b)

5

c)

20

d)

125

77.

The mechanical advantage of a pulley system depends upon?

a)

The diameter of the pulley wheels

b)

The length of the rope

c)

The number of sections of rope

d)

The direction of the input force

78.

No machine can be 100% efficient because of

a)

Thermal energy

b)

Waste energy

c)

Convection energy

d)

Friction

79.
Which example shows an unbalanced force? 
a)
A pencil sitting on a desk
b)
a car parked in a parking lot
c)
a coat laying on the floor
d)
a child sliding down a slide
80.
Which of these is an example of a balanced force? 
a)
A book sitting on a chair
b)
a ball rolling down the road
c)
a fish swimming in its bowl
d)
a plate sitting in the sink
81.
Distance/Time = __________?
a)
Speed
b)
Force
c)
Work
d)
Power
82.
Your mass increases as you grow. How does this affect the force of gravitational attraction between you and other objects?
a)
the force decreases
b)
the force increases
c)
the force stays the same
d)
the force does not change without a change in distance.
83.
Wheels on a skateboard most likely experiences-
a)
Rolling Friction
b)
Sliding Friction
c)
Fluid Friction
d)
Static Friction
84.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds 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
85.
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
86.
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 
87.
An object at rest will _______ if no outside forces are applied.
a)
Stay at rest
b)
Increase Velocity
c)
Decrease Mass
88.
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
89.
Which of the following is not an inclined plane?
a)
wrench
b)
axe
c)
chisel
d)
ramp
90.
A mechanical advantage of <1 indicates...
a)
you are unable to determine just by the number value
b)
you are at a disadvantage when you use the machine
c)
the whole system is in balance
d)
you are at an advantage when you use the machine
91.
A mechanical advantage of 1 indicates ...
a)
you are at an advantage when using the machine
b)
you are unable to determine just by the number value
c)
you are at a disadvantage when using the mcahine
d)
the system is in balance
92.
The majority of the appendage-joint combinations in the human body ...
a)
are 2nd class levers
b)
are 1st class levers
c)
cannot be classified as a specific lever type
d)
are 3rd class levers
93.
Mechanical advantage is expressed ...
a)
in newtons squared
b)
in joules
c)
without any units
d)
in joules squared
94.
The unit for power is the ...
a)
watt
b)
joule
c)
newton
d)
dyne
95.
Which of the following items represents a second-class lever?
a)
seesaw
b)
tweezers
c)
crowbar
d)
nutcracker
96.
The resistance to motion created by two objects rubbing against each other is called:
a)
friction
b)
inertia
c)
gravity
d)
static
97.

Work = force x distance.

How much work was done to move a shopping cart weighing 150 N, 25 m?

a)

.17 J

b)

6 J

c)

3750 J

d)

5000 J

98.

The formula to calculate power is

P =  worktime\frac{work}{time}  
What is the power of a device that can perform 1500 J of work in 25 seconds?

a)

1500 watts

b)

0.016 watts

c)

60 watts

d)

37,500 watts

99.

Mechanical advantage of a machine is

a)

a measure of how "helpful" a machine is to you

b)

a measure of how much in multiplies the input force

c)

both Choices 1 and 2

d)

neither Choice 1 nor 2

100.

Efficiency is a comparison of

a)

input force to output force

b)

work output to work input

c)

power input to power output

d)

none of the above

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