What is power?

Power is known as the work done by a system in a unit of time. When the term refers to a process, it is defined as the change in energy recorded in the time taken between the starting and the final situation.

Consequently, power measures the speed with which energy is transformed. Its unit in the international system (SI) is the watt, defined as the power of a machine that does the work of 1 joule in the time of 1 second. Its symbol is W.

This difference in concepts is very important both in physics and in other disciplines to which it can be applied. Other multiples of this unit are often used, such as the kilowatt (kW), the megawatt (MW), and the horsepower (HP).