Power is defined as the rate at which work is done or energy is transferred. In the International System of Units (SI), the unit of work or energy is the Joule (J), and the unit of time is the second (s). Therefore, the unit of power is Joule per second (J/s), which is defined as the Watt (W).
The SI unit of mechanical power is :
Asked in UPSC CDS 1 2016 · Topic: Measurement/Unit (Derived Units and their Expression)
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