Question

what is the law consevation of momentum and derieve expressions of it
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Answer 1

The conservation of momentum states that, within some problem domain, the amount of momentum remains constant; momentum is neither created nor destroyed, but only changed through the action of forces as described by Newton's laws of motion.

Answer 2

Answer:

⇒m1v1+m2v2=m1u1+m2u2. ⇒ Final momentum (pf) = Initial momentum (pi). Thus, we conclude that during the interaction between the two balls, momentum before collision is equal to total momentum after collision. Thus, the momentum of the system is conserved in the absence of external forces.