Chapter 4: Work & Energy

Fill in the Blank. Work is done when _______ causes a change in the motion of an object in the direction of the applied force.

• force

• mass

• velocity

• distance

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Fill in the Blank. The law of conservation of energy says that _______ cannot be created or destroyed.

• energy

• matter

• force

• mass

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Fill in the Blank. _______ energy is the energy a moving object has because it is moving.

• kinetic

• potential

• thermal

• nuclear

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Fill in the Blank. _______ energy is stored energy.

• potential

• kinetic

• thermal

• nuclear

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Fill in the Blank. Energy is the ability to do _______.

• work

• play

• rest

• sleep

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If you apply a large force to something but it does not move, ____.

• A. work has been done

• B. no work has been done

• C. no energy is lost

• D. you are using a compound machine

Most things people use are ____.

• compound machines

• simple machines

• levers

• inclined planes

Lightning and running a dishwasher are both examples of ____ energy.

• A. chemical

• B. electrical

• C. heat

• D. radiant

Machines help people do work by:

• Increasing efficiency and productivity

• Decreasing the need for any human intervention

• Eliminating all forms of manual labor

• Making work more complicated

A rubber band has potential energy when it is:

• stretched or compressed

• lying on a table

• in a sealed packet

• cut into pieces

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