Answers2026 Summer 305 CR_2002040-MJ Comprehensive Science 1Potential and Kinetic Energy

Potential and Kinetic Energy — Unit test Answers

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1
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What is the unit of measure for energy?

A
watt
B
newtons
C
joules
D
meters per second
2
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Which is occurring when work is being done?

A
Energy is being reverted.
B
Energy is being decreased.
C
Energy is being increased.
D
Energy is being transferred.
3

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

A
position, gravity
B
gravity, velocity
C
velocity, height
D
height, position
4

The table shows information about four students who are running around a track. Which statement is supported by the information in the chart?

Question illustration
A
Autumn has more kinetic energy than Chiang.
B
Mohammed has less kinetic energy than Autumn.
C
Lexy has more kinetic energy than Mohammed.
D
Chiang has less kinetic energy than Lexy.
5

Which two types of potential energies would be types of mechanical energies?

A
electrical and kinetic
B
nuclear and chemical
C
radiant and thermal
D
elastic and gravitational
6

If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

A
Total energy increases.
B
Stored energy decreases.
C
Energy of motion decreases.
D
Total energy decreases.
7

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

A
the volume and height the ball reaches
B
the volume and shape of the ball
C
acceleration due to gravity and the height the ball reaches
D
acceleration due to gravity and the shape of the ball
8

When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this change?

A
work
B
power
C
gravitational energy
D
chemical energy
9

When Javier touches a hot mug of tea, energy is transferred from the surface of the mug to his hand. What kind of energy is this?

A
nuclear
B
radiant
C
thermal
D
chemical
10

How does work affect energy between objects so it can cause a change in the form of energy?

A
Work transfers energy.
B
Work changes energy.
C
Work increases energy.
D
Work decreases energy.
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 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
13

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
14

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
15

When Anna eats an apple, the sugars in that apple are broken down into the substance called glucose. Glucose is then burned in her body for energy. One of the body parts that needs this energy is the heart, which beats due to electrical impulses. A byproduct of this glucose breakdown is the heat that warms her body and is later released.

A
Mechanical energy is converted to kinetic energy, which is then converted to potential energy.
B
Chemical energy is converted to thermal energy and electrical energy.
C
Electrical energy is converted to chemical energy and thermal energy.
D
Mechanical energy is converted to potential energy which is then converted to kinetic energy.
16

Shondra takes notes in class.

Question illustration
A
Switch "the energy of moving objects" and "the ability to do work" and place chemical energy under "Forms of energy."
B
Switch "the energy of flowing electrical charges" and "the energy in a spring" and place kinetic energy under "Forms of energy."
C
Switch "the energy in the nuclei of atoms" and "the energy stored in objects'" and place nuclear energy under "Main categories of energy."
D
Switch "the energy from the Sun" and "the energy of a rock on a hill" and place electrical energy under "Main categories of energy."
17

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.
18

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
19

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
20

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

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