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Work and Power Review

Total questions: 72

Worksheet time: 48mins

Name
Class
Date
1.
Which of the following is a true statement about work?
a)
It measures how quickly an object accelerates 
b)
It measures how much effort is applied over a certain distance
c)
It measures the change in an object's rate of speed
d)
It measures how much time it takes to move a massive object
2.
What does one newton exerted over a distance of one meter equal?
a)
One watt
b)
One hertz
c)
One volt 
d)
One joule 
3.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
4.
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
a)
600 J 
b)
660 J
c)
900 J 
d)
1200 J 
5.
Which of these is a measure of force?
a)
100 newtons
b)
100 meters per second
c)
100 joules
d)
100 watts
6.
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
7.
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
8.
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
9.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
10.
Work divided by time equals...
a)
energy
b)
power
11.
The unit of work is the ...
a)
joule
b)
force
12.
The unit of power is the...
a)
work
b)
watt
13.
Force multiplied by distance equals...
a)
work
b)
power
14.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)
True
b)
False
15.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
16.
The more POWER you use to move an object, the more work you do. 
a)
True
b)
False
17.
Power is the RATE at which work is done. 
a)
True
b)
False
18.

What is needed to calculate work?

a)

force

b)

distance

c)

time

d)

mass

19.

Which of the following best defines WORK?

a)

When a force makes an object move in the direction of the force.

b)

It is the measurement of an objects mass times the gravity.

c)

It is a push or a pull.

d)

A force resisting the relative motion of solid surfaces sliding against each other.

20.

Which of the following best defines POWER?

a)

The speed of something in a given direction.

b)

It is energy possessed by an object relative to its position.

c)

It is a push or a pull.

d)

It is how fast work is done.

21.

Which of the following best defines APPLIED FORCE?

a)

The speed of something in a given direction.

b)

It is energy possessed by an object relative to its position.

c)

It is a push or a pull.

d)

It is how fast work is done.

22.

What is the UNIT of measurement for WORK?

a)

Newtons (N)

b)

meters (m)

c)

Watts (W)

d)

Joules (J)

23.

What is the UNIT of measurement for POWER?

a)

Newtons (N)

b)

meters (m)

c)

Watts (W) or Joules/second (J/s)

d)

Joules (J)

24.

What is the UNIT of measurement for FORCE?

a)

Newtons (N)

b)

meters (m)

c)

Watts (W)

d)

Joules (J)

25.

WORK transfers energy from one object to another.

a)

True

b)

False

26.

What is the formula to solve for WORK?

a)

W = P x t

b)

W = P / t

c)

W = t / P

d)

W = P - t

27.

What is the formula to solve for POWER?

a)

P = W x t

b)

P = W / t

c)

P = t / W

d)

P = W - t

28.

What is the formula to solve for TIME?

a)

t = W x P

b)

t = W / P

c)

t = P / W

d)

t = W - P

29.

What type of Work?

The applied force is in the OPPOSITE DIRECTION to the direction of motion or distance.

a)

Negative Work

b)

Positive Work

c)

Zero Work

30.

What type of Work?

Applied force WITHOUT MOTION or applied force PERPENDICULAR to the motion.

a)

Negative Work

b)

Positive Work

c)

Zero Work

31.

What type of Work?

The applied force is in the SAME DIRECTION as the direction of motion or distance.

a)

Negative Work

b)

Positive Work

c)

Zero Work

32.

Identify the type of work:

Carrying a stack of books while walking. 

Force is UPWARDS and books are moving to the RIGHT. 

a)

Negative Work

b)

Positive Work

c)

Zero Work

33.

Identify the type of work:

Lifting weights upwards. 

Force is UPWARDS and weights are moving UPWARDS. 

a)

Negative Work

b)

Positive Work

c)

Zero Work

34.

Identify the type of work:

Pulling a rope and sliding forward. 

Force is BACKWARDS and body is moving FORWARDS.

a)

Negative Work

b)

Positive Work

c)

Zero Work

35.

Identify the type of work:

Opening a door. 

Force is BACKWARDS and door is moving BACKWARDS. 

a)

Negative Work

b)

Positive Work

c)

Zero Work

36.
  • Power and time are inversely proportional.

Increase power = _______ time

a)

increase

b)

decrease

37.
  • Power and work are directly proportional.

Increase power = _______ work

a)

increase

b)

decrease

38.
  • _______ is how fast the work is done.

a)

Power

b)

Work

c)

Force

d)

Joules

39.

What is work (W) in the context of physics?

a)

The amount of effort put into a task

b)

The transfer of energy that occurs when a force makes an object move

c)

The distance an object travels

d)

The time taken to complete a task

40.

What unit is used to measure work in physics?

a)

Newton

b)

Pascal

c)

Joule

d)

Watt

41.

Which two conditions must be met for work to be done according to physics?

a)

Object must move and force must be applied in the direction of the movement

b)

Force must be applied and object must be heavy

c)

Object must move and work must be done in a short time

d)

Work must be done quickly and efficiently

42.

What does the equation W = Fd represent in physics?

a)

W = weight, F = friction, d = duration

b)

W = work, F = force, d = distance

c)

W = watt, F = frequency, d = diameter

d)

W = wave, F = field, d = depth

43.

What are the units for work, force, and distance respectively?

a)

Newtons, Joules, Meters

b)

Joules, Newtons, Kilometers

c)

Joules, Newtons, Meters

d)

Watts, Joules, Meters

44.

What does the symbol 'P' represent in the context of the given material?

a)

Pressure

b)

Probability

c)

Power

d)

Pulse

45.

What is the unit of power as mentioned in the learning material?

a)

Newton

b)

Joule

c)

Watt

d)

Pascal

46.

According to the formula provided, power is calculated as work done divided by what?

a)

Force

b)

Distance

c)

Time

d)

Velocity

47.

What is the unit of work as used in the formula for power?

a)

Newton-meter

b)

Joule

c)

Watt

d)

Kilogram

48.

What is the unit of time used in the formula for calculating power?

a)

Seconds

b)

Minutes

c)

Hours

d)

Milliseconds

49.
How much work is being done with 200 N of force over 426 meters?
a)
85,200 J
b)
45,620 J
c)
90,480 J
d)
62,329 J
50.
If 150 Joules of work is needed to move a box 10 meters, what force was used? 
a)
1500 N
b)
15 N
c)
1.5 N
d)
150 N
51.

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

52.
In which of these cases is work being done? 
a)
A student sleeps
b)
A student pushes a locked door that does not move
c)
a student carries his chair into another room
d)
A student sits on the carpet
53.
True or false: when the distance an object moves is zero the work done on the object is also zero.  
a)
True
b)
False
54.
Work is done when a weightlifter holds a barbell still above his head.
a)
True
b)
False
55.

What would 54N be an example of?

a)

work

b)

power

c)

distance

d)

force

56.

what would 1m be an example of?

a)

work

b)

power

c)

time

d)

distance

57.

what would 14J be an example of?

a)

work

b)

distance

c)

time

d)

force

58.

What is an example of a force?

a)

Energy

b)

Power

c)

Pressure

d)

Weight

59.
The amount of work done in a certain amount of time is known as 
a)
work
b)
effort force
c)
resistance force 
d)
power
60.
A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 
a)
77 J
b)
7.7 J 
c)
0.7 J 
d)
770 J 
61.
A weightlifter lifts two 300 newton weights 1.5 meters off the ground. How much work has he done?
a)
600 J 
b)
660 J
c)
900 J 
d)
1200 J 
62.
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
63.
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
64.
Which of the following would produce the most power?
a)
A mass of 10 kilograms lifted 10 meters in 10 seconds 
b)
A mass of 10 kilograms lifted 10 meters in 5 seconds
c)
A mass of 5 kilograms lifted 10 meters in 5 seconds
d)
A mass of 5 kilograms lifted 5 meters in 10 seconds
65.
Work divided by time equals...
a)
energy
b)
power
66.
The unit of work is the ...
a)
joule
b)
force
67.
The unit of power is the...
a)
work
b)
watt
68.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
69.
The more POWER you use to move an object, the more work you do. 
a)
True
b)
False
70.
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
71.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
72.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J