What is the definition of power in the context of work done?

In the context of work done, power is defined as the rate at which work is performed or energy is transferred over time. This means that power measures how quickly work is accomplished or energy is utilized. The formula for power is given as the amount of work done divided by the time taken to do that work. Therefore, the unit of power, the watt (W), is equivalent to one joule per second (J/s), emphasizing that it reflects a timing aspect—how fast or slow work is being done.

While capacity, mass, and force are important concepts in physics, they do not pertain to the rate of doing work. Capacity relates to the maximum amount something can contain or produce, mass refers to the amount of matter in an object, and force is an influence that can change the motion of an object. Hence, in the specific context of defining power in relation to work done, the rate is the most accurate description.