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In science, the most common metric unit of power is the watt.

Power and Work Equivalencies

1 watt = 1 joule/second

1 joule = 1 newton × meter

Rock In science, the most common metric unit of power is the watt. A watt is a rate of 1 joule per second. Let’s go back to that heavy rock that you and your friend moved. If it took you 4 seconds to move that rock 3 meters, and the force you used to move the rock was 150 newtons, we saw that the power output that you two generated was 112.5 joules per second.

Now convert that to watt units, the basic unit of measure for power.

112.5 joules / sec = 112.5 watts

Watts and joules are precise scientific units.