*For electrical power and other forms of power, see***Energy**.

**Power** is a key concept in physics, describing how quickly work is done or energy is transferred. It's about measuring the speed at which energy is used to perform a task or the amount of energy consumed within a certain timeframe.

The standard measurement for power is the Watt (W), but there are other ways to measure it too, like horsepower (HP), calories per hour (cal/hr), and foot-pounds per minute (ft-lb/min). The basic formula to calculate power is P=W/t, where P stands for power, W for work, and t for time. Another way to look at it is P=E/t, where E represents energy. This gives us a way to quantify and understand the efficiency of processes and machines in our daily lives and in the scientific world.

## Definition[edit | edit source]

In a physics term, **power** is the rate at which work takes place or energy is transmitted. It can also be defined as the amount of energy needed or used to complete an activity over a period of time.

## Units[edit | edit source]

The SI unit for power is the the Watt or "W". Other non SI units include:

- horsepower "HP",
- calories per hour, "cal/hr", and
- foot pounds per minute "ft-lb/min".

## Equation[edit | edit source]

The equation for power is where P is power, W is work and t is time. A second equation for power is where E is energy and t is time.