AnswersFall 24 GSE Physical Science B ICIntroduction to Energy

Potential and Kinetic Energy Answers

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1
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Which two factors are used to calculate the kinetic energy of an object?

A
gravity and velocity
B
velocity and mass
C
mass and volume
D
volume and height
2
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This diagram shows a skier moving down a hill.

Question illustration
A
The skier has potential and kinetic energy.
B
The skier has only potential energy.
C
The skier has only kinetic energy.
D
The skier does not have potential or kinetic energy.
3

What is the kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s? (Formula:)

Question illustration
A
25 J
B
5 J
C
50 J
D
100 J
4

A soccer ball is traveling at a velocity of 50 m/s. The kinetic energy of the ball is 500 J. What is the mass of the soccer ball? (Formula: )

Question illustration
A
0.1 kg
B
0.2 kg
C
0.4 kg
D
0.5 kg
5

An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: )

Question illustration
A
7.5 kg
B
15 kg
C
60 kg
D
120 kg
6

Let's consider a scenario of a roller coaster ride. As the roller coaster at the top begins to descend, it loses height, which means its potential energy decreases and kinetic energy starts increasing and reaches its maximum value.By using the above scenario, which statement best compares potential and kinetic energy?

A
Objects always have more potential energy than kinetic energy.
B
Kinetic energy increases and potential energy decreases when the velocity of an object increases.
C
Only potential energy decreases when an object’s height increases.
D
Objects always have more kinetic energy than potential energy.
7

Ella has a mass of 56 kg, and Tyrone has a mass of 68 kg. Ella is standing at the top of a skateboard ramp that is 1.5 meters tall. Which conclusion is best supported by the given information?

A
If Tyrone stands at the top of the same ramp, his potential energy will be less than Ella’s.
B
If Tyrone stands at the top of a 1 m high ramp, his potential energy will be greater than Ella’s.
C
If Tyrone stands at the top of the same ramp, his potential energy will be the same as Ella’s.
D
If Tyrone stands at the top of a 2 m high ramp, his potential energy will be greater than Ella’s.
8

The table shows information about four objects resting at the top of a hill. Which object is on the tallest hill?

Question illustration
A
W
B
X
C
Y
D
Z
9

A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller coaster? (Formula: PE = mgh)

A
800 kg
B
7,840 kg
C
8,000 kg
D
78,400 kg
10

This diagram shows a baseball’s motion.

Question illustration
A
Kinetic energy becomes potential energy between points R and S.
B
Maximum potential energy is at point P.
C
Maximum potential energy is at point R.
D
Potential energy becomes kinetic energy between points P and Q.
11

The diagram shows a ball resting at the top of a hill.

Question illustration
A
The potential energy in the system is greatest at X.
B
The kinetic energy in the system is greatest at X.
C
Total energy in the system decreases as the ball moves from X to Y.
D
Total energy in the system increases as the ball moves from X to Y.
12

Which of the following are natural resources? Choose four correct answers.oilcropsdump trucksplasticmineralswater

A
oil
B
crops
C
dump trucks
D
plastic
E
minerals
F
water
13

What is the role of resources and scarcity in making economic decisions?

A
Scarcity makes many resources less valuable.
B
Resource scarcity can limit what producers make.
C
Economic decisions are not affected by resource scarcity.
D
Economic decisions only involve valuable resources.
14

Which of the following are scarce resources that affect economic decisions? Choose three correct answers.specialized skillslimited financial capitalgovernment regulationslimited natural resourcesunnecessary equipment

A
specialized skills
B
limited financial capital
C
government regulations
D
limited natural resources
E
unnecessary equipment
15

A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled’s potential energy? (Formula: PE = mgh)

A
90 J
B
56.8 J
C
441 J
D
882 J
16

The amount of kinetic energy an object has depends on which feature of the object?

A
its motion
B
its position
C
its gravity
D
its height
17

A car is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy of the car? (Formula: )

Question illustration
A
36,300 J
B
43,200 J
C
72,600 J
D
86,400 J

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