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ECP Chapter 9: Work, Power, & Energy Review

Total questions: 50

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
The unit of power is the...
a)
work
b)
watt
2.
The unit of work is the ...
a)
joule
b)
force
3.
Work is done on an object when the object moves in the SAME direction in which the force is applied.
a)
True
b)
False
4.
The FARTHER you move an object, the more work you do.
a)
True
b)
False
5.
The more POWER you use to move an object, the more work you do. 
a)
True
b)
False
6.
Power is the RATE at which work is done. 
a)
True
b)
False
7.
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 
8.
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 
9.
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
10.
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
11.
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
12.
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
13.
The SI Unit for Work
a)
Newton (N)
b)
Joule (J)
c)
Second (s)
d)
Watt (W)
14.
The SI Unit for Force
a)
Newton (N)
b)
Joule (J)
c)
Second (s)
d)
Watt (W)
15.
The SI Unit for Time
a)
Newton (N)
b)
Joule (J)
c)
Second (s)
d)
Watt (W)
16.
The SI Unit for Power
a)
Newton (N)
b)
Joule (J)
c)
Second (s)
d)
Watt (W)
17.
What is the formula for Work?
a)
E=mc2
b)
W= F x d
c)
P = W/T
18.
What is the formula for Power?
a)
E=mc2
b)
W= F x d
c)
P = W/T
19.
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
20.
When a pendulum swings, at which point is potential energy at its greatest
a)
1
b)
2
c)
3
d)
4
21.
When a pendulum swings, at which point is kinetic energy highest?
a)
1
b)
2
c)
3
d)
4
22.
What kind of energy is in a battery?
a)
Potential
b)
Kinetic
23.
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 
a)
Both the potential energy and kinetic energy decrease
b)
The potential energy decreases while the kinetic energy increases 
c)
The kinetic energy decreases while the potential energy increases 
d)
Bothe the potential energy and kinetic energy increase 
24.
An Xbox consumes 15.7 watts while in standby mode. If you leave it in standby mode for 86,400 seconds (one day), how much work was done?
a)
1,356,490 J
b)
1,356,480 J
c)
1,356,470 J
d)
1,356,460 J
25.
How far does a car that weighs 5,000 N go if 18,000 J of work is done on it?
a)
3.8 m
b)
3.7 m
c)
3.2 m
d)
3.6 m
26.
How much time is needed to produce 720 Joules of work if 90 watts of power is used? 
a)
0.125 s
b)
8 s
c)
64800 s
d)
80 s
27.
A person weighing 600 N gets on an elevator. The elevator lifts the person 6 m in 10 seconds.  How much power was used?
a)
360 W 
b)
60 W
c)
3600 W
d)
600 W
28.
Would it be easier to move a box of the same mass up a ramp that was long and gradual or short and steep?
a)
long and gradual
b)
short and steep
29.

What happens when electrical energy is changed to thermal energy?

a)

An energy change takes place.

b)

A force changes takes place.

c)

An energy conversion takes place.

d)

An electrical conversion takes place

30.

When you eat fruits and vegetables, which of the following types of energy are you taking in?

a)

Thermal energy

b)

Sound energy

c)

Electrical energy

d)

Chemical energy

31.

What is the energy of motion?

a)

Gravitational Potential energy

b)

Energy

c)

Light energy

d)

Kinetic energy

e)

Potential energy

32.

What is the ability to do work?

a)

Gravitational Potential energy

b)

Energy

c)

Light energy

d)

Kinetic energy

e)

Potential energy

33.

What is the energy an object has because of its position called?

a)

Gravitational Potential Energy

b)

Energy

c)

Light Energy

d)

Kinetic Energy

e)

Potential Energy

34.

What is the total energy an object has due to its motion and position?

a)

Gravitational Potential Energy

b)

Energy

c)

Kinetic Energy

d)

Potential Energy

e)

Mechanical Energy

35.

What is the energy an object has because it is lifted?

a)

Gravitational Potential Energy

b)

Energy

c)

Kinetic Energy

d)

Potential Energy

e)

Electrical Energy

36.

What is energy caused by an object's vibrations?

a)

Gravitational Potential Energy

b)

Kinetic Energy

c)

Potential Energy

d)

Sound Energy

e)

Mechanical Energy

37.

What do we call the energy of moving electrons?

a)

Gravitational Potential Energy

b)

Sound Energy

c)

Electrical Energy

d)

Mechanical Energy

e)

Thermal Energy

38.

When is the Potential Energy the Greatest in a roller coaster?

a)

At the bottom of hill A

b)

At the top of hill A

c)

At the top of hill B

d)

At the bottom of hill B

39.

After an energy conversion, you end up with the same total amount of energy as the original amount of Potential Energy. Which of the following laws explains this rule?

a)

Law of Energy Changes

b)

Law of Conservation of Energy

c)

Law of Power and Energy

d)

Law of Potential Energy

40.

Any time an energy conversion takes place, some of the original energy is converted to which one of the following?

a)

Sound Energy

b)

Potential Energy

c)

Light Energy

d)

Thermal Energy

41.

The equation for POTENTIAL ENERGY is

a)

PE = mass x gravity x height

b)

PE = gravity x weight

c)

PE = height / work

d)

PE = work / time

42.

The equation for KINETIC ENERGY is

a)

KE = mass x gravity

b)

KE = 1/2 height x speed

c)

KE = mass2

d)

KE = 1/2 mass x speed2

43.

The product of the net force on an object and the distance through which the object is moved

a)

joule

b)

power

c)

work

d)

energy

44.

________________ is the rate at which work is done.

a)

Power

b)

Work

c)

Time

d)

Energy

45.

This theorem states, "Whenever work is done, energy changes.

a)

Work-Energy Theorem

b)

Paul-Newman Theorem

c)

Action-Reaction Theorem

d)

Study-Now Theorem

46.

Energy cannot be ________ or ___________.

a)

big/small

b)

left/right

c)

created/destroyed

d)

made/transferred

47.
The SI Unit for Mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
48.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
49.
Gravitational potential energy depends on the ________ and ________ of the object. 
a)
Height and mass
b)
Friction and movement
c)
Mass and Movement
d)
Height and Friction 
50.
What is the formula for calculating the total amount of mechanical energy?
a)
ME = KE + PE
b)
KE = ME + PE
c)
PE = KE + ME
d)
ME = 1/2 mv2

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