We have the following situation: In space, a basketball flies and hits another resting basketball.
What happens next?
a) Both balls fly in the original direction (but slightly slower) = momentum conservation (inelastic collision)
b) First ball stops, second ball flies in original direction with originally speed = momentum conservation (elastic shock) (newton's cradle)
c) Both balls repel each other and fly in different directions = action-reaction
And again the same with metal balls?