Modern Physics 8-1: Conservation of Newtonian momentum is incompatible with Special Relativity
Channel: Mark Ancliff
Date: 2020-04-26

These videos are taken from a lecture course on Modern Physics I taught at the Catholic University of Korea in Spring 2016.

In this video we see that the law of conservation of Newtonian momentum is incompatible with the postulates of special relativity. This is because two observers with different velocities will disagree about the conservation, violating the principle of relativity.