Work, Power and Energy Review

In order for Work to happen, what 2 things must occur?

• Mass and Displacement
• Force and Mass
• Force and Work
• Force and displacement

How many joules of work are done against a cart when a force of 50 N pushes it 1 kilometer away?

• 7000 J

• 5000 J

• 5500 J

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Is this an example of work?

• Yes

• No

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What is the unit of measurement for work?

• meters

• newtons

• m/s

• Joules

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For work to be done on an object, the direction and force have to be going the same direction.

• True

• False

_____________ is the rate of doing work.

• Conservation of energy

• Joules

• Energy

• Power

Power is measured in ___________.

• meters

• joules

• newtons

• watts

You do 40 Joules of work in 8 seconds. How much power did you exert?

• 0.2 watts

• 320 watts

• 5 watts

The law of Conservation of Energy says________

• energy is constantly created

• energy can not be created or destroyed instead it changes from one form to another

• energy can not change forms

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Energy is:

• The ability to do work

• The amount of power

• Movement

• Causing things to happen

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