GED Science Practice Test: Power

Power is the rate at which work is done and is represented by the following formula:

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The unit for power is the Watt.  A Watt is a Joule per second (remember that Joules are the unit for work).  What the power formula tells you is that for an object doing work faster, that object has more power.  A person who lifts boxes to the top of a shelf faster has higher power than a person who lifts boxes to the top of a shelf more slowly.

 

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