The capacity to do work is termed Energy. The Energy expended to do work in unit time is termed as Power. It is represented as P. Power Formula is articulated as, Learn how to calculate power as the rate of energy transfer or work done with respect to time. Find out the definitions, formulas, units, and examples of average and instantaneous power , power efficiency, and power in machines. Power is defined as the rate at which energy is converted or transferred over time. In the International System of Units (SI), the unit of power is the watt (W), where 1 watt equals 1 joule per second. Power is a scalar quantity, meaning it has magnitude but no direction. It is denoted by P. The image below shows a man lifting a weight, demonstrating his muscular power — a form of physical power generated by the muscles to perform work: Power Formula , Power is defined as the time rate of ... Power is the rate of doing work i.e., \begin {align} P=\frac {W} {t}. \end {align} Its unit is Watt and dimensions are ML 2 T -3. The power $P$ delivered by a force $\vec {F}$ is related to the velocity $\vec {v}$ by \begin {align} P=\vec {F}\cdot\vec {v}. \end {align}
