# Power

- The number of times a number or expression is multiplied by itself, for which the symbol is an index or exponent. For example, is the fourth power of
*x*.

- Anything raised to the power of 0 is equal to 1, including 0 to the power of 0.

- Other notation used to denote x raised to the power of n, x
^{n}= x^n = x**n

## Mathematics

## Mechanical Engineering

- It may also be determined by
*where**P*= Power [Js^{-1}or W]*F*= Force [N]*v*= velocity [ms^{-1}]

1 ft lbfs^{-1} | = | 1.356 W | 1 ft lbf min^{-1} | = | 0.0226 W | |

1 horsepower | = | 550 ft lbfs^{-1} | 1 horsepower | = | 745.7 W | |

1 ft poundal sec | = | 0.0421 W |

Family car (100PS) | 7.4x10^{4} W |

Sun energy production | 3.9x10^{26} W |

**See also: **Active Power, Brake Horse Power, Cheval Vapeur, Horsepower, Motive Power, Power to Weight Ratio, Prony, SI Units, Torque to Power, True Power.

**Subjects: ** Physics