Question

Explain how momentum gets conserved in collision of two bodies?

Answer 1

Deformation is relaated to energy (E=m*S^2/2) rather than momentum (m*V), watch the difference between S=speed whivh is squared and V=velocity which is related to a direction, in a collapse or an explosion the overall momentum is zero.

Answer 2

Law of conservation of linear momentum state that, when the resultant external force acting on a system of interacting bodies is zero,

(i.e. an isolated system) the totel linear momentum of the system of interacting bodies remains constant or conserved.