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SUB 10/3 Work and Power

Total questions: 100

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

The distance the resistance end of a lever moves is called the _________.

a)

Output Distance

b)

Output Work

c)

Output Force

2.

The ratio of work output to work input is called

a)

energy

b)

efficiency

c)

friction

d)

mass

3.

No machine can be 100% efficient because of

a)

Thermal energy

b)

Waste energy

c)

Convection energy

d)

Friction

4.

The factor by which a simple machine makes doing work feel easier.

a)

Input Force

b)

Efficiency

c)

Mechanical Advantage

5.

You apply a force of 10 N on to the end of a lever to open a paint can lid. The

resistance of the lid is 20 N. Calculate the MA.

(a)  

6.

You apply a force on a crowbar to open a stuck door. The effort length of the

crowbar is 24 cm long and the resistance length is 6 cm. Find the MA of the crowbar.

(a)  

7.

A compound machine --

a)

Doesn't exist

b)

is a combination of two or more simple machines

c)

is only one simple machine

d)

is used to make work harder

8.

The Mechanical Advantage (MA) of a simple machine makes work

a)

Easier

b)

Harder

c)

No difference to the work done

d)

None Of the above

9.

The force exerted on the machine is the ______ _______, and the force the machine exerts on an object is called the _______ _______.

a)

output force, input force

b)

input force, output force

c)

greater force, lesser force

10.

The input force multiplied by the input distance equals the

a)

input work.

b)

output work.

c)

work.

d)

power.

11.

The output force multiplied by the output distance equals the

a)

input work.

b)

work.

c)

output work.

d)

power.

12.

True or False? A machine can make work easier to do by changing the size of the force needed, the direction of a force, or the distance over which a force acts.

a)

True

b)

False

13.

A machine can increase the __________ exerted, the ________ moved, or change an object's ____________.

a)

force, distance, direction.

b)

force, distance, area.

c)

force, distance, power.

14.

What is mechanical advantage?

a)

the number of times a machine increases distance an object moves

b)

the number of times a machine increases a force exerted on it

c)

the number of times a machine increases the power of itself

15.

The _________ of a machine compares the output work to the input work.

a)

efficiency

b)

force

c)

work

d)

shininess

16.

The work done by a machine is always less than the work done on a machine because of (a)   .

17.
A 50 N block is lifted 10 m. How much work was done?
a)

50000 N

b)
5000 J
c)
500 J
d)
50 J
18.

Finding the ratio of input force to output force of a machine calculates the

a)

mechanical advantage.

b)

advantage.

c)

force advantage.

d)

power advantage.

19.

Machines make work easier by doing what?

a)

Changing the size of a force needed

b)

Changing the direction of a force

c)

changing the distance over which a force acts

d)

all of the above

20.

The IMA of a simple machine is 2.5. If the output distance is 1.0M, What is the input distance?

(Show your work)

4 lines
21.

The force exerted by a machine is called the (a)   force.

22.

True or False? Every machine uses some of its work input to overcome friction.

a)

True

b)

False

23.

___ of a machine is the mechanical advantage in the absence of friction?

a)

Mechanical advantage

b)

Actual mechanical advantage

c)

Ideal Mechanical Advantage

d)

Efficiency

24.

A woman drives her car onto wheel ramps to perform repairs. If she drives a distance of 1.8m along the ramp to raise the car 0.3m, what is the IMA of the wheel ramps?

a)

54

b)

3

c)

6

d)

2.1

25.

A 120-M long ski lift carries skiers from a station at the foot of a slope to a second station 40 m above. What is the IMA of the lift? (Show your work)

4 lines
26.

The force exerted on the machine is the ______ _______, and the force the machine exerts on an object is called the _______ _______.

a)

output force, input force

b)

input force, output force

c)

greater force, lesser force

27.

The input force multiplied by the input distance equals the

a)

input work.

b)

output work.

c)

work.

d)

power.

28.

The output force multiplied by the output distance equals the

a)

input work.

b)

work.

c)

output work.

d)

power.

29.

A machine can increase the __________ exerted, the ________ moved, or change an object's ____________.

a)

force, distance, direction.

b)

force, distance, area.

c)

force, distance, power.

30.

The _________ of a machine compares the output work to the input work.

a)

efficiency

b)

force

c)

work

d)

shininess

31.
What is a simple machine?
a)
a device that has only one working motor
b)
a device that makes work easier
c)
a device that makes more work for a job
d)
device that is made up of two or more machines
32.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.  
a)
wedge
b)
screw
c)
lever
d)
inclined plane 
33.

The work done by a machine is always less than the work done on a machine because of (a)   .

34.
The resistance to motion created by two objects rubbing against each other is called:
a)

friction

b)

inertia

c)

gravity

d)

static

35.

Machines make work easier by doing what?

a)

Changing the size of a force needed

b)

Changing the direction of a force

c)

changing the distance over which a force acts

d)

all of the above

36.

If a machine increases the distance over which a force is exerted, the force required to do a given amount of work (a)   .

37.

Select the definition for input force.

a)

The amount of force exerted by a machine

b)

The amount of friction slowing the speed of a machine

c)

The amount of work done by a machine

d)

The amount of force exerted on a machine

38.

True or False? Every machine uses some of its work input to overcome friction.

a)

True

b)

False

39.

The force exerted by a machine is called the (a)   force.

40.

True or False? Output work is always less than input work.

a)

True

b)

False

41.
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
42.

What is (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

43.

What is (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

44.

What is (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

45.

What is (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

46.

Name the 6 simple machines

4 lines
47.

What is the output distance of a machine that require 2 newtons of force exerted over 6 meters and whose output force is 4 newtons?

a)

2 meters

b)

3 meters

c)

6 meters

d)

12 meters

48.
Any device that makes work easier is called a ______________________.
a)
Joule 
b)
prop
c)
lever
d)
machine
49.
The efficiency of a machine can be increased by reducing __________________________. 
a)
effort
b)
force
c)
fulcrum
d)
friction
50.
The unit used to measure work is the 
a)
Watt
b)
Newton
c)
Joule
d)
Meter
51.
The unit used to measure power is the 
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
52.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
53.
Force is a _____ or _______
a)
simple    complex
b)
push     pull
c)
up      down
d)
in      out
54.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
55.
No machine in existence has 100% efficiency due to ____________________.
a)
magic
b)
friction
c)
smoke
d)
input
56.
Two or more simple machines used together is a 
a)
compound machine 
b)
wheel and axle 
c)
block and tackle 
d)
mechanical advantage 
57.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
58.
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
59.

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

60.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
61.
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
62.
What is work?
a)
A push or pull.
b)
When the object moves in the same direction in which the force is exerted.
c)
A change in energy.
d)
The rate at which energy is transferred.
63.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
64.

If you have the same work as someone, but in less time

a)

You are more powerful

b)

You are less powerful

c)

You have the same power

65.
Which is doing work?
a)
pushing a wall
b)
holding a box
c)
picking up a pencil
d)
sitting in a chair
66.
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
67.

Your car is stuck in the mud. You push with 500 N of force but it never moves. How much work did you do?

a)

0 J

b)

500 J

c)

500 N

d)

0 N

68.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
69.

You push against the back of your friends car that is stuck. You push and be become very tired, but the car does not move. Did you do work?

a)

Yes, work was done

b)

No, work wasn't done

70.

What would 54N be an example of?

a)

work

b)

power

c)

distance

d)

force

71.

what would 1m be an example of?

a)

work

b)

power

c)

time

d)

distance

72.

what would you solve for if given distance and force?

a)

work

b)

power

c)

time

d)

motion

73.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
74.

If you increase your work and decrease your time, you will have

a)

more power

b)

less power

c)

same amount of power

d)

power rating can not be determined

75.

What would you solve for if given time and work?

a)

power

b)

force

c)

distance

d)

work

76.

A kid applies a force of 70 N to a ball over 1.0 meters. How much work did he do on the ball? 

a)

70 J

b)
7.7 J 
c)
0.7 J 
d)
770 J 
77.
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
78.
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
79.
Work divided by time equals...
a)
energy
b)
power
80.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
81.
A 50N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
82.
Who wrote the books "Lord of the Rings" and "The Hobbit" which were adapted into movies?
a)
C.S. Lewis
b)
JRR Tolkein
c)
Peter Jackson
d)
Samwise Gamgee
83.
A cat has how many muscles in each ear?
a)
12
b)
32
c)
52
d)
2344567890
84.
Which country eats the most chocolate (per person)?
a)
USA
b)
China
c)
Columbia
d)
Switzerland
85.

How many sides are on a standard #2 pencil?

a)

4

b)

5

c)

6

d)

7

86.

Like your fingerprints, you also have a unique

a)

Tongue print

b)

Toe print

c)

Hair follicle

d)

Fingernail texture

87.
Which animal sleeps with one eye open?
a)
gorillas
b)
dolphins
c)
snakes
d)
lions
88.
How many people have walked on the moon?
a)
12
b)
15
c)
32
d)
55
89.
How is his name spelled?
a)
Neagi
b)
Naegi
c)
Niegi
d)
Niagi
90.
How do you evolve Nidorina/Nidorino into Nidoqueen/Nidoking?
a)
Level 50
b)
Give them a black belt and train them up to Level 30 at night
c)
Use a Moon Stone on them
d)
Trade them with another player
91.
Macaroni, Gentoo, Chinstrap and Emperor are types of what animal?
a)
Penguin
b)
Discus Fish
c)
Eagle
d)
Guinea Pig
92.
This animal has the strongest bite of all mammals.
a)
bengal tiger
b)
lion
c)
hippo
d)
cheetah
93.

The average dog is as smart as a ___ year old.

a)

30

b)

1

c)

2

d)

4

94.

What is the name of the Grinch's dog?

a)

Max

b)

Cosmo

c)

Tank

d)

Sam

95.

Who is this artist?

a)

Lil Pump

b)

Lil Nas X

c)

Lil Uzi Vert

d)

Lil Wayne

96.

What is Post Malone's real first name?

a)

John

b)

Matthew

c)

Austin

d)

Richard

97.

What type of animal is Manny in the movie Ice Age?

a)

Squirrel

b)

Sloth

c)

Sabretooth Tiger

d)

Mammoth

98.

Which female superhero is named Diana and carries the lasso of truth?

a)

Black Widow

b)

Wonder Woman

c)

Gamora

d)

Super Girl

99.

In Fortnite, what is the Battle Bus?

a)

A vehicle you can drive on the Fortnite map

b)

A vehicle that transports you from spawn island to the map

c)

What you get when you win

d)

Concept Art used to advertise Fortnite

100.

In Minecraft, what is the name of this ore?

a)

redust

b)

redstone

c)

red ore

d)

twinkling red

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