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Simple Machines

Total questions: 45

Worksheet time: 2hrs 32mins

Name
Class
Date
1.
The transfer of energy that occurs when a force makes an object move
a)
Power
b)
Work
c)
Machine
d)
Efficiency
2.
Amount of work done in a certain amount of time
a)
Power
b)
Work
c)
Machine
d)
Efficiency
3.
A measure of how much work put into a machine is changed into useful output work by the machine
a)
Power
b)
Work
c)
Machine
d)
Efficiency
4.
The number of times a machine multiplies the effort force
a)
Power
b)
Work
c)
Mechanical Advantage
d)
Efficiency
5.
A machine that uses a combination of two or more simple machines
a)
Machine
b)
Compound machine
c)
Simple machine
d)
Mechanical advantage
6.
A device that makes doing work easier
a)
Machine
b)
Compound machine
c)
Simple machine
d)
Mechanical advantage
7.
A bar that is free to pivot about a fixed point called the fulcrum
a)
Incline Plane
b)
Lever
c)
Pulley
d)
Screw
8.
A grooved wheel with a rope, simple chain, or a cable running along the groove
a)
Incline Plane
b)
Lever
c)
Pulley
d)
Screw
9.
An incline plane wrapped in a spiral around a cylindrical post
a)
Incline Plane
b)
Lever
c)
Wedge
d)
Screw
10.
A sloping surface that reduces the amount of force required to work
a)
Incline Plane
b)
Lever
c)
Wedge
d)
Screw
11.
A machine with two wheels of different sizes rotating together
a)
Wheel and Axle
b)
Pulley
c)
Wedge
d)
Screw
12.
These machines are all examples of 
a)
wheel and axles
b)
pulleys
c)
levers
d)
incline planes
13.
These machines are all examples of 
a)
wheel and axles
b)
wedges
c)
levers
d)
incline planes
14.
These machines are all examples of 
a)
wheel and axles
b)
wedges
c)
screws
d)
incline planes
15.
These machines are all examples of 
a)
wheel and axles
b)
wedges
c)
screws
d)
incline planes
16.
These machines are all examples of 
a)
wheel and axles
b)
wedges
c)
screws
d)
incline planes
17.
These machines are all examples of 
a)
wheel and axles
b)
wedges
c)
lever
d)
incline planes
18.
The unit of power is
a)
joule
b)
MA
c)
watt
d)
second
19.
Which of the following cannot be done by a simple machine?
a)
change the direction of the force
b)
increase the amount of work done
c)
decrease the time it takes to do work
d)
transfer energy from one location to another
20.
What causes the efficiency of a machine to always be less than 100%?
a)
friction
b)
poor design
c)
limited strength of the user
d)
elastic limit of the parts
21.
In an ideal machine, which of the following would be true?
a)
work input is equal to work output
b)
work input is less than work output
c)
work input is greater than work output
d)
work input is independent of  work output
22.
What is the most likely reason that a carpenter might put a thin coat of oil on the blade of a saw before cutting wood?
a)
to soften the wood
b)
to reduce the friction
c)
to stain the wood
d)
to waterproof the blade
23.
Which pulley system would require the least amount of effort to lift the weight?
a)
A
b)
B
c)
C
d)
D
24.
What is the correct order for the types of levers?
a)
1st, 2nd, 3rd,
b)
3rd, 2nd, 1st
c)
2nd, 3rd, 1st
d)
3rd, 1st, 2nd
25.
A gear is what type of simple machine?
a)
pulley
b)
wedge
c)
wheel and axle
d)
lever
26.

A force of 20N was used to move a couch 4 meters, how much work was done? (W = f x d)

a)

5 Joules

b)

80 Joules

c)

16 Joules

d)

24 Joules

27.

A machine that does work with only one movement is called a

a)

simple machine

b)

compound machine

c)

complex machine

d)

mechanical advantage

28.

Force applied to the machine is called

a)

Resistance Force

b)

Effort Force

c)

Regulatory Force

d)

Output Force

29.

Force applied by the machine to overcome resistance is called

a)

Resistance Force

b)

Effort Force

c)

Regulatory Force

d)

Output Force

30.

An incline plane with one or two sloping sides

a)

Incline plane

b)

slope

c)

screw

d)

wedge

31.

A system of pulleys designed to multiply the effort force is called a

a)

simple pulley

b)

fixed pulley

c)

movable pulley

d)

block and tackle

32.

What class of levers are pictured here?

a)

1st class

b)

2nd class

c)

3rd class

d)

4th class

33.

What class of levers are pictured here?

a)

1st class

b)

2nd class

c)

3rd class

d)

4th class

34.

What class of levers are pictured here?

a)

1st class

b)

2nd class

c)

3rd class

d)

4th class

35.

Substances added to machines to reduce friction are called

a)

surfactants

b)

friction fighters

c)

lubricants

d)

thermal conductors

36.
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
37.

Which one of the following correctly identifies the simple machine families pictured here?

a)

Top: Lever family Bottom: Wedge family

b)

Top: Lever family Bottom: Incline plane family

c)

Top: Pulley family Bottom: incline plane family

d)

Top: Wheel and Axle family Bottom: Screw family

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.

What is the mechanical advantage of a lever that has an effort arm of 3 meters and an resistance arm of 2 meters? (effort arm/resistance arm)

a)

1.5

b)

1

c)

0.67

d)

3

41.

A 8-meter ramp lifts objects to a height of 2 meters. What is the mechanical advantage of the ramp? (length/height)

a)

16

b)

4

c)

.25

d)

10

42.
The efficiency of a machine can be increased by reducing __________________________. 
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
43.

Find the mechanical advantage of a wheel and axle system if the wheel has a radius of 12 inches and the axle has a radius of 6 inches if the force is put on the axle. (radius of wheel/radius of axle)

a)

.5

b)

72

c)

2

d)

5

44.

The load is 3 feet from the pivot point, the effort is applied 12 feet from the pivot point and the load weights 30 pounds. What is the mechanical advantage? (effort arm/resistance arm)

a)

4

b)

3

c)

12

d)

34

45.

What is the efficiency of a car that has enough fuel to drive 600 miles, but only actually drives 150 miles? (Work out/work in x 100)

a)

25%

b)

4%

c)

400

d)

.25

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