The concept of inertia and momentum are regularly confused because of their similar definitions. Inertia is the resistance offered by a body to the motion whereas momentum is the tendency of a body to continue moving. Let us look at the differences between the two to understand the concept better.

## Difference between Momentum and Inertia

Momentum |
Inertia |
---|---|

Momentum is a vector quantity as it the tendency of a body to remain in motion. |
Inertia is a scalar quantity as it is the resistance offered by the body to motion. |

Momentum is denoted as ‘ |
Inertia is denoted as ‘ |

The momentum of a body of mass ‘m’ moving with a velocity of ‘ |
The inertia cannot be calculated using a formula. |

Linear momentum and angular momentum are the two types of momentum. |
Inertia of rest, inertia of motion and inertia of direction are the three types of inertia. |

Momentum depends on mass and velocity. |
Inertia depends only on mass. |

The total momentum is conserved. |
Inertia has nothing to do with the conservation of energy. |

The difference between between momentum and inertia should be understood clearly as these are an important topic in Physics. To Know more about momentum and inertia, Visit BYJU’S.