Energy Transformations — Unit test Answers
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Which is an example of potential energy?
A
a swimmer kicking their legsB
a car driving on the roadC
an arrow flying at a targetD
a yo-yo in someone’s hand3
How much time is needed for a 15,000 W engine to do 1,800,000 J of work? (Power: P = W/t)
A
0.008 sB
8 sC
120 sD
1,785,000 s4
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.5
Fiona claims that the diagram below shows simple machines, but Chad claims that it shows a compound machine.
A
Fiona is correct because only one machine is shown in the diagram.B
Fiona is correct because the diagram shows two individual simple machines.C
Chad is correct because more than one machine is shown in the diagram.D
Chad is correct because the diagram shows two simple machines doing a job.6
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.7
This table shows four examples of experiments.
A
Lily and HenryB
Astrid and BobC
Lily, Astrid, Henry, and BobD
Astrid, Henry, and BobDid you find these answers helpful?
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