What is defined as the rate of doing work?

Power is defined as the rate at which work is done or the amount of energy transferred or converted per unit time. It provides a measure of how quickly work can be performed or energy can be used. When considering various contexts, such as mechanical systems or electrical applications, power is calculated as work done over a specific period, typically expressed in watts in the International System of Units. This concept is fundamental in understanding various physical processes and interactions, making it vital in fields such as physics, engineering, and technology.

In contrast, speed refers to how fast an object is moving without regard to direction, force is a vector that represents an influence on an object leading to a change in motion, and energy is the capacity to do work. While these terms are interconnected within physical principles, only power specifically addresses the concept of work done over time.