Question

explain how momentum gets conserved in collision of two bodies

Answer 1

Momentum doesn't conserved in all the cases of collisions.
Momentum gets conserved in this two cases

1) Perfectly Elastic collision (Kinetic energy also remains conserved here)
2) Partially Inelastic collision

Probably a convincing answer from me is

This is because of Newton's 3rd law of motion.

Think mass in this way 'An ability to retrain the acceleration when a force is applied'

Answer 2

Answer:get from s Chand book

Explanation:check properly