# Question #bf36a

##### 1 Answer

Jun 6, 2015

If the collision is non-elastic, there are some loss in energy, therefore :

- The mechanical energy and the kinetic energy aren't conserved.

However :

- The momentum (
#p = mv# ) and the angular momentum (#L = rmv# or#L = I omega# ) are still conserved.

In the case of a perfectly inelastic collision, the colliding masses will stick together; for the momentum, you would have something like :