Question

Two bodies of masses 5 kg and 3 kg moving in the same direction along the same straight line with velocity is 5 m/s and 3 m/s respectively Suffer one dimensional elastic collision find their velocities after the collision

Answer 1

According to the law of conservation of momentum
Initial momentum = final momentum

initial momentum of the system = (5kg×5m/s)+(3kg×3m/s) = 34kg-m/s
final momentum of the system = (5kg+3kg)×Vm/s

so, 34 = (5+3)V
=> V=34/8=4.25m/s