Two perfectly elastic balls of same mass m are moving with velocities u1 and u2. They collide elastically n times. The kinetic energy of the system finally is :

Center of MassHard

Question

Two perfectly elastic balls of same mass m are moving with velocities u₁ and u₂. They collide elastically n times. The kinetic energy of the system finally is :

Options

A.u₁²

B.(u₁²−u₂²)

C.m (u₁²−u₂²)

D.mn (u₁²−u₂²)

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