Question

explain conservation of momentum​

Answer 1

Answer:

momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion

If there is no external force acting on the system; momentum of the system is conserved.

Like momentum is the force applied in some time

Check out the attachment  below u might get something out of it

 

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Answer 2

Answer:

If there is no external force acting on the system; momentum of the system is conserved. During the collision balls exert force to each other. From the Newton's third law these forces are equal in magnitude and opposite in direction. Ball having m2 mass exerts force on m1 and ball having m2 mass exerts force on m1.