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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Which best defines energy?

A
a type of wave that carries energy through space, where there is almost no matter
B
a disturbance that carries energy form one place to another through matter and space
C
the ability to do work
D
pressing to make more compact
2
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Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?

A
Energy is transferred.
B
Energy is increased.
C
Energy is decreased.
D
Energy is unchanged.
3

The total energy in a system is 675 J. The kinetic energy changes from 296 J to 432 J. Which statement best describes the potential energy of this system?

A
It changes from 296 J to 432 J.
B
It changes from 379 J to 243 J.
C
It changes from 432 J to 296 J.
D
It changes from 243 J to 379 J.
4

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)

A
3.9 m
B
4.0 m
C
39.2 m
D
40.0 m
5

Ryan is examining the energy of the particles in a bar of gold. What is Ryan most likely studying?

A
thermal energy
B
electric energy
C
potential energy
D
internal energy
6

Which is an example of potential energy?

A
a swimmer kicking their legs
B
a car driving on the road
C
an arrow flying at a target
D
a yo-yo in someone’s hand
7

This table shows four examples of experiments.

Question illustration
A
Lily and Henry
B
Astrid and Bob
C
Lily, Astrid, Henry, and Bob
D
Astrid, Henry, and Bob
8

Kyle has a mass of 54 kg and is jogging at a velocity of 3 m/s. What is Kyle’s kinetic energy? (Formula: )

Question illustration
A
18 J
B
81 J
C
162 J
D
243 J

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