What is Power?

• A. The rate of doing work.
• B. The capacity to do work.
• C. The amount of time in minutes, hours, seconds.
• D. The speed of an object in a direction.

Answer: (A)

Power is the rate at which work is done or energy is transferred. It tells you how quickly energy is being used or moved, not the total amount of energy itself. So it’s not about how much work you can do overall (that’s energy), not about how long something takes by itself, and not about how fast an object is moving.

In formula terms, power equals work divided by time (P = W / t). You can also think of it as the rate of energy change (P = ΔE / Δt). If you perform the same amount of work in less time, the power is higher; doing it more slowly lowers the power.

For example, lifting the same weight the same distance in half the time doubles the power, because the same work is done in half the time. Since power is the rate of doing work, the best description among the options is the one that states power is the rate at which work is done.