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Energy Conservation

Total questions: 102

Worksheet time: 2hrs 34mins

Name
Class
Date
1.

An object that is moving has

a)

chemical energy

b)

chemical energy

c)

potential energy

d)

kinetic energy

e)

elastic energy

2.

An object that is at rest on top of a bookshelf has

a)

chemical energy

b)

chemical energy

c)

potential energy

d)

kinetic energy

e)

elastic energy

3.

If you are rolling down a big hill you are (a)   the kinetic energy.

4.

If you are rolling down a big hill you are (a)   the potential energy.

5.

Which letter shows the ball when it has THE MOST potential energy?

a)

A

b)

B

c)

C

d)

F

e)

G

6.

Which letter shows the ball when it has NO potential energy?

a)

B

b)

C

c)

D

d)

E

e)

F

7.

Which letter shows the ball when it has THE MOST kinetic energy?

a)

B

b)

C

c)

D

d)

E

e)

F

8.

Which letter shows the ball when it has THE LEAST kinetic energy?

a)

A

b)

B

c)

C

d)

F

e)

G

9.

Which letter shows the ball when it is moving the fastest?

a)

B

b)

C

c)

D

d)

E

e)

F

10.

Which letters shows the ball when it has BOTH kinetic and potential energy?

The ball starts and ends AT REST. List all that apply in alphabetic order!

(a)  

11.

The Law of Conservation of Energy states:

a)

Energy can created or destroyed but not transformed

b)

Energy cannot be created or destroyed, it can only transformed

c)

Energy can't be created, destroyed or transformed

d)

Energy cannot be created or destroyed.

12.

What kind of energy does an object possess when it's resting on top of the hill?

a)

Potential Energy

b)

Chemical Energy

c)

Kinetic Energy

d)

All of the above

13.

What do you need to add to kinetic energy in order to find an object’s mechanical energy?

a)

Initial Energy

b)

Gravitational Energy

c)

Thermal Energy

d)

Potential Energy

14.

What force causes a roller coaster cart to slow down the most?

a)

friction

b)

weight

c)

gravity

d)

air resistance

15.

What is the formula for Kinetic Energy?

a)

KE = mass x velocity

b)

KE= 1/2 x mass x velocity 2

c)

KE = mass x gravity x height

d)

KE = mass x velocity / 2

16.
What energy transformation occurs from a light bulb? 
a)
Electrical energy = kinetic energy + potential energy 
b)
Electrical energy = electrical energy 
c)
Electrical energy = chemical energy 
d)
Electrical energy = light energy + thermal energy 
17.
The law of energy conservation says the total energy before the change _______ the total energy after it
a)
is less than
b)
is more than
c)
affects
d)
equals
18.
Which 2 letters have the most kinetic energy
a)
W & Y
b)
X & Z
19.
Energy can be created.
a)
True
b)
False
20.
Roller coasters slow down because their energy disappears.  
a)
True 
b)
False
21.

Which form of energy is represented in this image?

a)

kinetic

b)

thermal

c)

potential

d)

radiant

22.

What happens when the ball goes from the highest position to the lowest position

a)

PE and KE increases and decreases together

b)

Impossible to know without knowing the mass of the object

c)

the PE decreases while KE increases

23.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
24.

What kind (s) of energy is (are) in this image?

a)

Potential

b)

Kinetic

c)

Both Potential and Kinetic

25.

The SI Unit for Energy is

a)

Joule

b)

Potential

c)

Calorie

d)

Kilojoule

26.

Efficiency is calculated by Energy Out divided by Energy In, expressed as a percentage

a)

False

b)

True

27.

What percentage of Energy is wasted by a human being converting food into work?

a)

15%

b)

25%

c)

50%

d)

75%

28.

A combustion engine driving car loses most of it energy (75%) to heat. Is this energy loss or energy transformation?

a)

loss

b)

transformation

c)

neither

d)

both

29.

A toy car down a ramp loses most of its energy to

a)

friction

b)

sound

c)

heat

d)

gravity

30.

The energy of a certain point with respect to some reference point is

a)

Spatial Energy

b)

Velocity

c)

Potential Energy

d)

Kinetic energy

31.
What is the unit of Potential Energy?
a)
m, mass
b)
kg, kilogram
c)
J, Joules
d)
m/s, meters/second
32.
If the Total Mechanical Energy is 50J, Potential Energy is 40 J, what is the Kinetic Energy?
a)
1 J
b)
10 J
c)
90 J
33.
What kind of energy does an object possess when it's resting on top of the hill?
a)
Potential Energy
b)
None
c)
Kinetic Energy
d)
All
34.
Which specific type of energy is at point A?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
35.
Which specific type of energy is at point B?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
36.
Which specific type of energy is at point C?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
37.
Which specific type of energy is at point D?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
38.
Which variable is always constant (doesn't change)?
a)
mass
b)
height
c)
velocity
d)
None
39.
What is the v in this equation? Choose the one with the CORRECT unit!
a)
volume (m3)
b)
velocity (m/s)
c)
velocity (m/s2)
d)
volume (v)
40.
What is the g? Choose the one with the correct unit!
a)
mass (kg)
b)
gravity (m/s)
c)
gravity (m/s2)
d)
grams (g)
41.
When the velocity of the car is given, what kind of energy can we calculate right away?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
42.
At the bottom of the roller coaster, what kind of energy is NEVER present?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
43.
At the top of the roller coaster, which energy is ALWAYS present?
a)
Potential Energy
b)
Kinetic Energy
c)
Mechanical Energy
d)
None
44.
Which equation would you use to solve for point A?
a)
(1/2)mv2
b)
mgh
c)
(1/2)mv2+mgh
45.
What is the total mechanical energy at point A if the car is 10 meters above the ground?
a)
0 J
b)
15 J
c)
50 J
d)
500 J
46.
What is the total mechanical energy at point B?
a)
0 J
b)
15 J
c)
50 J
d)
500 J
47.
What is the potential energy at point B?
a)
0 J
b)
15 J
c)
50 J
d)
500 J
48.
What is the kinetic energy at point B?
a)
0 J
b)
15 J
c)
50 J
d)
500 J
49.
Calculate the velocity of the car at point B.
a)
10 m/s
b)
14 m/s
c)
10 m/s2
d)
14 m/s2
50.
If the roller coaster is 2 meters above the ground at point C, what is its potential energy?
a)
10 m/s
b)
100 m/s
c)
10 J
d)
100 J
51.
At point C, the TME= 500 J, and its PE= 100 J, what is its KE?
a)
600 J
b)
400 J
c)
200 J
d)
100 J
52.
Calculate the velocity of the car at point C.
a)
10 m/s
b)
12 ms/
c)
13 m/s
d)
15 m/s
53.
Energy can be created.
a)
True
b)
False
54.
Energy cannot be destroyed.
a)
True 
b)
False
55.
When something is dropped, what type of energy transfer takes place?
a)
Kinetic -> Potential
b)
Gravitational Potential -> Kinetic -> Sound
c)
Electrical -> Chemical
d)
Heat -> Nuclear
56.
Imagine dropping a basketball. When would it have the most gravitational potential energy?
a)
When it is closest to the ground
b)
When it is at the highest point
c)
When it is halfway down
d)
It has the same amount of gravitational PE at all points
57.
Food has _______ potential energy that our bodies transform into kinetic energy.
a)
Elastic
b)
Nuclear 
c)
Gravitational
d)
Chemical
58.
Energy is the ability _____________.
a)
to do work
b)
to power things
c)
to move objects
d)
to turn on a light
59.
According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?
a)
The total amount of energy is conserved
b)
The total amount of energy is less after a reaction
c)
The total amount of energy is more after a reaction
60.
The Law of Conservation of Energy states:
a)
Energy can created or destroyed but not transformed 
b)
Energy cannot be created or destroyed, it can only transformed
c)
Energy can't be created, destroyed or transformed
61.
Potential or kinetic?
Stretched bow and arrow?
a)
kinetic
b)
potential
62.
Potential or kinetic?
Running?
a)
potential
b)
kinetic
63.

This term refers to the amount of matter contained in an object.

a)

Joules

b)

Matter

c)

Energy

d)

Mass

64.

This term refers to a force being used to move an object.

a)

Energy

b)

Joules

c)

Mass

d)

Work

65.

This is the standard unit for measuring energy.

a)

Joules

b)

Newtons

c)

Matter

d)

Mass

66.

This is a type of potential energy.

a)

Sound energy

b)

Electrical energy

c)

Chemical energy

d)

Thermal energy

67.

This is a type of kinetic energy.

a)

Gravitational energy

b)

Elastic energy

c)

Sound energy

d)

Nuclear energy

68.

This is they type of energy stored in a battery.

a)

Gravitational energy

b)

Elastic energy

c)

Nuclear energy

d)

Chemical energy

69.

This type of energy is a measure of how fast the particles of an object are moving.

a)

Sound energy

b)

Thermal energy

c)

Radiant energy

d)

Thermal energy

70.

If two objects are about to be dropped from some height, the heavier one has:

a)

Less potential energy

b)

More potential energy

c)

The same amount of potential energy

71.

If two marbles are rolled down a ramp from some height towards a container the _______ marble will move the container farther because it possess more _________ energy as it approaches the end of the ramp.

a)

heavier, kinetic

b)

heavier, potential

c)

lighter, kinetic

d)

lighter, potential

72.

What energy transformations are occurring in this picture?

a)

gravitational potential --> sound --> thermal

b)

chemical potential --> mechanical --> elastic potential --> gravitational

c)

electrical --> sound --> thermal --> radiant

d)

chemical potential --> radiant --> thermal

73.

What energy transformation are occurring in this picture?

a)

gravitational potential --> sound --> thermal

b)

chemical potential --> mechanical --> elastic potential --> gravitational

c)

electrical --> sound --> thermal --> radiant

d)

chemical potential --> radiant --> thermal

74.

At which point would this roller coaster possess the greatest amount of potential energy?

a)

1

b)

2

c)

3

d)

4

75.

At which point would this roller coaster possess the most kinetic energy?

a)

1

b)

2

c)

3

d)

4

76.

At which point on this roller coaster would the amount of total energy equal the amount of potential energy?

a)

1

b)

2

c)

3

d)

4

77.

List one reason why a roller coaster will eventually come to a stop, even if the brakes are not applied.

4 lines
78.

What kind(s) of energy is(are) in a person climbing a ladder?

a)

Potential

b)

Kinetic

c)

Both

d)

Need the mass of the person to determine.

79.

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

a)

The PE and KE increase and decrease together

b)

The PE decreases while the KE increases

c)

Impossible to know without knowing the mass

d)

The PE and the KE decrease and increase together.

80.
At which point is potential energy greatest?
a)
W
b)
X
c)
Y
d)
Z
81.

According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?

a)

The total amount of energy is conserved

b)

The total amount of energy is less after a reaction

c)

The total amount of energy is more after a reaction

d)

Need the mass of the object to determine if energy is conserved.

82.

When velocity triples, kinetic energy increases by ______ times. KE =1/2mv2

a)

9

b)

3

c)

1.5

d)

4.5

83.

What is the Total Mechanical Energy at point A?

a)

500,000 J

b)

400,000 J

c)

200,000 J

d)

50,000 J

84.

What is the Kinetic Energy at point B?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

85.

What is the Kinetic Energy at point C?

a)

500,000 J

b)

400,000 J

c)

300,000 J

d)

50,000 J

86.

What is the Kinetic Energy at point D?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

50,000 J

87.

What is the GPE at point E?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

100,000 J

88.

What is the GPE at point F?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

0 J

89.

What is the KE at point F?

a)

500,000 J

b)

250,000 J

c)

300,000 J

d)

0 J

90.

When something is dropped, what type of energy transfer takes place?

a)

Kinetic -> Gravitational Potential

b)

Gravitational Potential -> Kinetic -> Sound

c)

Electrical -> Chemical

d)

Heat -> Nuclear

91.

If two marbles are rolled down a ramp from some height towards a container the _______ marble will move the container farther because it possess more _________ energy as it approaches the end of the ramp.

a)

heavier, kinetic

b)

heavier, potential

c)

lighter, kinetic

d)

lighter, potential

92.

In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?

a)

411,600 J

b)

294,000

c)

176,400 J

d)

117,600 J

93.
In diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?
a)
19.8 m/s
b)
15.0 m/s
c)
10.3 m/s
d)
3.8 m/s
94.

If a 0.5 kg ball is thrown up with 250 J of kinetic energy, how high will it go?

(HINT: At the ball's highest point it has stopped.)

KE = 1/2mv2 , PE = mgh

g = 9.8 m/s2

a)

51 m

b)

25.5 m

c)

12.76 m

d)

31.6 m

95.

A cliff diver with a mass of 125 kg jumps off a 50m high cliff, how fast will he be traveling just before he hits the water? (His height at this point is 0m)

(HINT: Find PE first. then KE = 1/2mv2

g = 9.8 m/s2

a)

61,250 m/s

b)

980 m/s

c)

31.3 m/s

d)

247.5 m/s

96.

A person with a mass of 60 kg jumps in the air. If the gravitational potential energy is 1,470 J at the highest point, how did they jump?

a)

3.2 m

b)

49 m

c)

24.5 m

d)

2.5 m

97.

The rollercoaster has both PE and KE, but where will it have more PE than KE?

a)

1

b)

2

c)

3

d)

4

e)

5

98.

Where will the roller coaster have the most total mechanical energy? Check all that apply. Neglect friction and air resistance.

a)

1

b)

2

c)

3

d)

4

99.

A book has 200J of potential energy and then it falls onto the floor. After it hits the floor and is sitting still, what happened to the energy?

a)

It has disappeared.

b)

It goes into the floor and book as thermal energy and sound.

c)

It changes to chemical potential energy.

d)

It turns into gravity.

100.

The skateboarder shown above has a potential energy of 2,800 J and kinetic energy of 0J at a height of 4 meters. How much total mechanical energy will she have after 2 seconds? Neglect friction and air resistance.

a)

2000J

b)

1600J

c)

1400J

d)

2800J

101.

This graph depicts what type of relationship between kinetic and potential energy?

a)

Non-Linear

b)

Linear

c)

Inverse

d)

Poly-atomic

102.

A 5.0 kg object is pushed across the floor and the attached force vs. displacement graph describes the forces and displacement. What is the change in KE of the object? (Hint: Net work = change in kinetic energy)

a)

45 J

b)

30 J

c)

735 J

d)

40 J

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