Power is defined as
Correct answer: B. the rate at which work is done or energy is transferred
- A. the total work done
- B. the rate at which work is done or energy is transferred
- C. the force multiplied by the distance
- D. the energy stored in a body
Explanation
One watt is one joule per second, so power tells you how quickly energy is delivered rather than how much. Two motors may do the same work while one takes half the time and therefore has twice the power. Power can also be written as force multiplied by velocity when the force is constant.
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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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