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Review: Simple Machines

Total questions: 50

Worksheet time: 2hrs 42mins

Name
Class
Date
1.
work is...
a)
energy from the sun
b)
a type of machine
c)
a force that moves an object
d)
a force that pulls you toward the earh
2.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
3.
Which of these is an example of a wedge?
a)
skateboard
b)
broom
c)
stairs
d)
butter knife
4.
A screw is made up of _____ wrapped around a post or rod.
a)
threads
b)
springs
c)
treads
d)
strings
5.
Which of these is not an example of an inclined plane?
a)
ladder
b)
stairs
c)
wall
d)
driveway
6.
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
7.
Which type of simple machine would help you raise a flag on a flagpole?
a)
Wedge
b)
Pulley
c)
Inclined Plane
d)
Lever
8.
Which type of simple machine is the roof of a house?
a)
Wedge
b)
Pulley
c)
Inclined Plane
d)
Lever
9.
Which type of simple machine is a knife?
a)
Wedge 
b)
Pulley
c)
Inclined Plane
d)
Lever
10.
Which type of simple machine is a playground slide? 
a)
Wedge
b)
Pulley
c)
Inclined plane
d)
Lever
11.
Which type of simple machine is a found on the lid of a pickle jar?
a)
Pulley
b)
Screw
c)
Inclined plane
d)
Wedge
12.
Which type of simple machine is a steering wheel of a car?
a)
Pulley
b)
Wedge
c)
Wheel and axle
d)
Screw
13.
Which type of simple machine is a nail?
a)
Pulley
b)
Lever
c)
Wedge
d)
Inclined plane
14.

A machine with grooves that winds round and round in a spiral is a

a)

pulley

b)

screw

c)

wedge

d)

lever

15.

A machine that is round, and they turn to make things go is a

a)

screw

b)

wheel and axle

c)

lever

d)

pulley

16.

A bar that moves on or around a fixed point is a

a)

wheel and axle

b)

inclined plane

c)

lever

d)

pulley

17.

A special kind of wheel that changes the direction of the force. When you pull down the object goes up.

a)

wedge

b)

lever

c)

inclined plane

d)

pulley

18.

A machine used for slicing or cutting is a

a)

wedge

b)

inclined plane

c)

screw

d)

lever

19.

A surface, often flat, set at an angle to another surface is a(n)

a)

pulley

b)

inclined plane

c)

wedge

d)

lever

20.

Work is done when force

a)

pushes on something

b)

moves an object

c)

pulls on something

21.

Simple machines make work

a)

harder

b)

easier

22.

A tool with few or no moving parts that makes work easier by changing the size, direction, speed or distance of a force.

a)

simple machine

b)

compound machine

23.

A machine made of two or more simple machines working together.

a)

simple machine

b)

compound machine

24.

A door knob is a

a)

pulley

b)

wheel and axle

c)

wedge

d)

inclined plane

e)

screw

25.

A parking ramp is a

a)

lever

b)

wheel and axle

c)

wedge

d)

inclined plane

e)

pulley

26.

An elevator is a

a)

lever

b)

wheel and axle

c)

inclined plane

d)

screw

e)

pulley

27.

An ax is a

a)

lever

b)

wedge

c)

inclined plane

d)

screw

e)

pulley

28.

A light bulb is a

a)

lever

b)

wheel and axle

c)

wedge

d)

screw

e)

pulley

29.

A seesaw is a

a)

lever

b)

wedge

c)

inclined plane

d)

screw

e)

pulley

30.
The amount by which a machine multiplies input force is known as the 
a)
work.
b)
power.
c)
output force.
d)
mechanical advantage.
31.
Mechanical advantage is a measure of how much a machine multiplies the input
a)
efficiency.
b)
force.
c)
power.
d)
work.
32.
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
33.
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 
34.
if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?
a)
120 N
b)
5 N
c)
2000 N
d)
80 N
35.
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
36.
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
37.

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

38.

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

a)

2.4

b)

3.4

c)

4.4

39.

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

40.

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

41.

Which of the lever would it take less force to lift?

a)

Lever A

b)

Lever B

42.

How much effort would it take to lift Lever A?

a)

60 N

b)

50N

c)

40 N

d)

30 N

43.

How much effort would it take to lift Lever B?

a)

60 N

b)

50 N

c)

40 N

d)

30 N

44.
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
45.
What is the equation for mechanical advantage?
a)
MA=input force*output force
b)
MA=output force/input force
c)
MA=input force/output force
d)
MA= output force - input force
46.
What is the mechanical advantage if you lift a load of 300 newtons and you only push down with 50 newtons?
a)
250
b)
50
c)
60
d)
6
47.
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)
1000
d)
100
48.
What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?
a)
0.25 J
b)
26%
c)
386%
d)
3.86 J
49.
if a load of a lever is 100 newtons and the force you apply is 20 newtons, what is your mechanical advantage?
a)
120 N
b)
5 N
c)
2000 N
d)
80 N
50.
What is the efficiency of the machine if the input is 263 J and the output is 142 J? 
a)
6.26%
b)
54%
c)
100%
d)
260%

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