# Elastic and inelastic collisions

Gold Member

## Homework Statement

In a closed system, in an inelastic collision, momentum and total energy is conserved, but total kinetic energy is not.
But how is this possible? If we have a change in total kinetic energy, we have a change in velocity, and so we must have a change in momentum as:
momentum=mass*velocity
So I am really confused!
Thanks :)

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