The unit of power is _________?
Correct answer: A. watt
- A. watt
- B. Joule
- C. Newton
- D. Pascal
Explanation
Power is the rate of doing work or transferring energy, P = W/t, and its SI unit is the watt (W). One watt equals one joule per second, or 1 W = 1 J/s. The likely mistake is choosing joule, which is the unit of energy or work, not the rate at which it is transferred.
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About Power
Power is the rate at which work is done or energy is transferred, with average power calculated over a time interval and instantaneous power found from P = Fv when force and velocity are aligned. Work includes units, mechanical efficiency, and the distinction between power and total work or energy.
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