Momentum conservation

Hi! When a point object, like a steel ball, collides (without rolling)
in one dimension with another identical object at rest, and stops on
impact, the target object is supposed to acquire the momentum of the
incident object. However, in all real collisions some heat and noise
is always generated, which, of course, is energy that is dissipated.
Where does this energy come from if momentum is conserved? How could
momentum be conserved, if this energy comes at the expense of the
kinetic energy of the object?


Peter

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