Question

Mention the condition required for conservation of momentum

Answer 1

if the external force on a system is zero the momentum of system remains constant..ie. in an isolated system the total momentum remains conserved..

Answer 2

Momentum Conservation Principle. One of the most powerful laws in physics is the law of momentum conservation. ... For a collision occurring between object 1 and object 2 in an isolated system, the totalmomentum of the two objects before the collision is equal to the totalmomentum of the two objects after the collision.