Question

explain the law of conservation of momentum

Answer 1

According to the law of conservation, the momentum prudouced in a body before and after collision remains constant. , i.e,
m1u1+m2u2 = m1v1 + m2v2




Hope this will help :)

Answer 2

When two or more bodies act upon one another, their total momentum remains constant or conserved provided no external forces are acting.