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Prove how can LAW of CONSERVATION of MOMEMTUM IS SAME BEFORE AND AFTER COLLISION?

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Principle of conservation of linear momentum states that if the net external force on a system of particles is zero, the linear momentum of the system remains constant. Or we can say that the sum of momenta of the two objects before collision is equal to the sum of momenta after the collision provided there is no external unbalanced force acting on them.

Suppose two objects (two balls A and B, say) of masses mA and mB are travelling in the same direction along a straight line at different velocities uA and uB, respectively and there are no other external unbalanced forces acting on them. Let vA and vB are the velocities of the two balls A and B after the collision, respectively.

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shubham.krishnan

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