Answers SY2025-26 - 2002040 MJ Comprehensive Science 1 Sem 1 CRLab: Kinetic Energy

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Which is an example of potential energy?

a swimmer kicking their legs

a car driving on the road

an arrow flying at a target

a yo-yo in someone’s hand

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

18 J

81 J

162 J

243 J

Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?

Energy is transferred.

Energy is increased.

Energy is decreased.

Energy is unchanged.

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)

3.9 m

4.0 m

39.2 m

40.0 m

Which best defines energy?

a type of wave that carries energy through space, where there is almost no matter

a disturbance that carries energy form one place to another through matter and space

the ability to do work

pressing to make more compact

This table shows four examples of experiments.

Lily and Henry

Astrid and Bob

Lily, Astrid, Henry, and Bob

Astrid, Henry, and Bob

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?

It changes from 296 J to 432 J.

It changes from 379 J to 243 J.

It changes from 432 J to 296 J.

It changes from 243 J to 379 J.

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

thermal energy

electric energy

potential energy

internal energy

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