# Perfectly inelastic collision

## Description

A collision is an isolated event in which two or more moving bodies (colliding bodies) exert forces on each other for a relatively short time. Collision is short-duration interaction between two bodies or more than two bodies simultaneously causing change in motion of bodies involved due to internal forces acted between them during this. Collisions involve forces (there is a change in velocity). In a perfectly inelastic collision, the colliding particles stick together. ( It is necessary to consider conservation of momentum)

Related formulas## Variables

v | Final velocity (m/sec) |

m_{a} | Mass of the 1st body (kg) |

u_{a} | Initial velocity of the 1st body (m/sec) |

m_{b} | Mass of the 2nd body (kg) |

u_{b} | Initial velocity of the 2nd body (m/sec) |