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Work, Simple Machines, and Mechanical Advantage

Total questions: 25

Worksheet time: 17mins

Name
Class
Date
1.

what mechanical advantage is in a real situation?

a)

actual mechanical advantage

b)

ideal mechanical advantage

2.

which lever type is a wheel barrow?

a)

type 1

b)

type 2

c)

type 3

d)

none of them

3.

the mechanical advantage of a wheel and axle is...

a)

wheel diameter / force

b)

wheel diameter / axle diameter

c)

axle diameter / wheel diameter

4.

If I have a wedge with a MA of 5 and an output distance of 2, than what is the input distance?

a)

10

b)

100

c)

1000

d)

10000

5.

What is the mechanical advantage of a pulley system that looks like this?

a)

5

b)

8

c)

1

d)

2

6.
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
7.
How does a single fixed puled, like the one seen here, help you do work?
a)
changes the direction of the force
b)
increases the amount of applied force
c)
decreases the amount of applied force
d)
allows you to pull the rope a shorter distance
8.
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
9.
What is the primary mechanical advantage of using the simple machine seen in the image?
a)
You can apply a large force and have it penetrate over a very long distance.
b)
You can apply a long distance and have it convert into a very short distance.
c)
You can apply a short distance and have it multiplied to penetrate a large distance.
d)
You can apply a small force to penetrate something that normally requires a large force.
10.
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
11.
This pulley
a)
has a mechanical advantage of 1 and does not make work easier.
b)
has mechanical advantage of 2 and reduces the force needed to lift an object.
c)
has a mechanical advantage of 2 and changes the direction of the applied force.
d)
has a mechanical advantage of 1 and changes the direction of the force needed to lift an object.
12.

TYPE OF LEVER?

a)

1

b)

2

c)

3

13.

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

What is the mechanical advantage of the lever ?

a)

0.5

b)

2

c)

3

d)

6

14.

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)

0.25

15.

A ramp has a mechanical advantage of 4. If it is 15 feet long, how high is it?

a)

3.75 ft

b)

60 ft

c)

11 ft

d)

not enough information to solve

16.
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
17.
An object being lifted or moved is a
a)
load
b)
fulcrum
c)
force
d)
work
18.
________________ is done whenever a force moves an object a distance
a)
load
b)
friction
c)
force
d)
work
19.

the force the machine exerts on an object

a)

input force

b)

output force

c)

efficiency

d)

mechanical advantage

20.

the ratio of output force to input force

a)

work

b)

mechanical advantage

c)

efficiency

d)

power

21.

the fixed point that a lever pivots around

a)

wedge

b)

inclined plane

c)

lever

d)

fulcrum

22.

A first-class lever has the

a)

fulcrum at one end and the output force between the fulcrum and the input force

b)

fulcrum at one end and the input force between the fulcrum and the output force

c)

fulcrum in the middle

d)

input force in the middle

23.

Which of the following is not in the inclined plane family?

a)

a wedge

b)

a screw

c)

a ramp

d)

a wheel and axle

24.

Which of the following levers has the largest mechanical advantage?

a)

Lever A

b)

Lever B

c)

Lever C

d)

All 3 levers have the same mechanical advantage

25.

Which of the following pulleys shown is a block and tackle system?

a)

A and B

b)

C and D

c)

C, D, and E

d)

Only E

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