Power is correctly defined as
Correct answer: B. the rate of doing work
- A. the total work done
- B. the rate of doing work
- C. work done times time taken
- D. force times displacement
Explanation
Power is work done per unit time, measured in watts, where one watt is one joule per second. For a body moving at constant velocity it can also be written as force times velocity. Force times displacement is work itself, not the rate at which it is done.
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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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