# Acceleration

## Description

Acceleration, in physics, is the rate at which the velocity of an object changes over time. Mathematically, instantaneous acceleration—acceleration over an infinitesimal interval of time—is the rate of change of velocity over time.Here and elsewhere, if motion is in a straight line, vector quantities can be substituted by scalars in the equations.

Related formulas## Variables

a | acceleration (m/s^{2}) |

du | derivative of velocity vector as function of time (m/s) |

dt | time (s) |