Conservation theorem for the kinetic momentum of a single particle

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created: 2022-06-24 00:27:27
modified: 2022-06-24 00:30:02

Consider a point-like particle of mass .

If there is zero net force acting on it, then its kinetic momentum is conserved1.

Proof

Let's start from Newton 2:

This immediately shows that is conserved.


  1. That is, constant.