Power is defined as?

Power is defined as?

• A. The energy stored in an object
• B. The rate of doing work
• C. The rate at which work is done
• D. Energy transferred over distance

Answer: (C)

Power is the rate at which energy is transferred by doing work. In symbols, it’s P = dW/dt, meaning how much energy is moved per unit time. When a force moves an object, the work done is F·Δx (for motion aligned with the force), and dividing that energy transfer by the time gives the power. If the force acts along the motion, instantaneous power can be written as P = F·v, with the unit watts (joules per second). The best statement among the options is the one that says the rate at which work is done, because it matches this precise definition: power is how quickly work is performed, i.e., how fast energy is being transferred. The other ideas describe energy stored, or work itself (not its rate), or combine energy transfer with distance rather than with time.

Power is the rate at which energy is transferred by doing work. In symbols, it’s P = dW/dt, meaning how much energy is moved per unit time. When a force moves an object, the work done is F·Δx (for motion aligned with the force), and dividing that energy transfer by the time gives the power. If the force acts along the motion, instantaneous power can be written as P = F·v, with the unit watts (joules per second).

The best statement among the options is the one that says the rate at which work is done, because it matches this precise definition: power is how quickly work is performed, i.e., how fast energy is being transferred. The other ideas describe energy stored, or work itself (not its rate), or combine energy transfer with distance rather than with time.