What is the definition of power in physics?

Power in physics is defined as the rate at which work is done. This means it quantifies how quickly work is performed or energy is transferred over time. When we express power mathematically, it is often represented as the amount of work done divided by the time taken to do that work. This relationship is expressed in the formula:

[ P = \frac{W}{t} ]

where ( P ) is power, ( W ) is work, and ( t ) is time.

Understanding this concept is essential in various applications, such as in engines, electrical devices, and in understanding energy efficiency. For instance, a powerful engine can do a large amount of work in a short period, which is reflected in high power output. Thus, the correct answer highlights the dynamic aspect of power, contrasting with the mere measures of work or energy that do not account for the time factor involved in their performance.