Question

Q.11 Prove that the total momentum before collision is equal to total momentum after collision of two
balls or conservation of momentum.
​

Answer 1

For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2.

Hope it will helps ✌