Is momentum conserved in an elastic collision but not in an inelastic collision?

1 Answer
Apr 9, 2018


It is conserved also in an inelastic collision if some conditions are respected.


As long as no matter enters or exits the system and no external forces are acting upon our system momentum is conserved.

During a car collision it seems that the external force of weight should be considered BUT its action is along the vertical direction that doesn't affect the linear momentum along the horizontal.