Question

by using expression prove that total momentum before collision is equal to the total momentum after collision

Answer 1

with the absence of external force, the sum of the momentum of the two objects before the collision is equal to the sum of the momentum of two objects after the collision this is called the law of conservation of momentum.

m1u1+m2u2=m1v1+m2v2

Answer 2

The law of momentum conservation can be stated as follows. 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.