Energy, Work, and Power

# GED Science Practice Test: Power

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

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.