## anonymous 4 years ago what are the equations for the conservation of momentum for Inelastic and elastic collisions?

1. JamesJ

A collision is elastic or not depending on whether KE is conserved or not, as we've seen in a few of your questions now. That being the case, Conservation of Momentum is unchanged whether KE is conserved or not.

2. anonymous

How do I find the change in Kinetic energy

3. JamesJ

If a body of mass m has velocity v before an event and velocity v' after the event, then the change in KE is $KE_{after} - KE_{before}$ $= \frac{1}{2}mv'^2 - \frac{1}{2}mv^2$ $= \frac{1}{2}m (v'^2 - v^2)$