Elastic vs Inelastic collisions and conservation of momentum

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=-9y9UCGAcOc

How to tell if a collision is elastic or inelastic using conservation of momentum to find velocity and kinetic energy before and after. This is a common type...

elastic, inelastic, collisions, physics, momentum, ap physics, solutions, ellastic, inellastic, conservation of momentum
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