We didn’t finish with our three concepts of energy, work, and power yet! The important concept of Power is work done over time, and is measured in watts (W), which is a Joule per second (J/s).

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Work doesn’t have anything to do with time, but power does. Sometimes work is done slow, and other times faster. Someone hiking a mountain can reach the peak way before a rock climber, even though they are both traveling the same vertical distance. A hiker in our example has a higher power rating than a rock climber. Power is the rate that work is done.

Click here to go to next lesson on Power is Scalar.

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