**Power in Physics Definition:**

The rate at which work is done by a body or energy is transferred is called its power.

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## What is Power in Physics | Definition, Formula, Units – Work, Energy and Power

**Power in Physics Formula:**

Power = Rate of doing work = \(\frac{\text { Work done }}{\text { Time taken }}\)

If under a constant force F a body is displaced through a distance s in time t, then the power P = \(\frac{W}{t}=\frac{\mathbf{F} \cdot \mathbf{s}}{t}\)

But \(\frac{s}{t}\) = v, uniform velocity with which body is displaced.

∴ P = F . v = F v cos θ

where, θ is the smaller angle between F and v.

Power is Scalar Quantity.

**Power Unit in SI
**SI unit is watt.

**Power Dimensional Formula
**Dimensional formula is [ML²T

^{-3}].

Its other units are kilowatt and horse power,

- 1 kilowatt = 1000 watt
- 1 horse power =746 watt
- 1 kWh = 3.6 x 10
^{6}J

**Work, Energy and Power:**

Work, energy and power are the three quantities which are inter-related to each other. The rate of doing work is called power. An equal amount of energy is consumed to do a work. So, basically the power is the rate at which energy is consumed to complete a work.

Work | Energy |

Conservation of Energy | Power |

Collisions | Elastic and Inelastic Collisions in One Dimension |

Collisions in Two Dimensions |