Asked by kate

two objects move toward each other collide and separate. there was no net external force acting on the objects but some kinetic energy was lost. is momentum conserved ? what is the explanation ?
Answered by Steve
if KE is lost, energy was not conserved.
So, momentum is not conserved.

The missing energy is lost as heat. It's still present in the system, but the moving bodies no longer account for all the energy in the system.
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