Two perfectly elastic balls of same mass m are moving with velocities `u_(1)` and `u_(2)`. They collide elastically n times. The kinetic energy of the system finally is:

Options

A. `1/2m/uu_(1)^(2)`
B. `1/2m/u(u_(1)^(2)+u_(2)^(2))`
C. `1/2m(u_(1)^(2)+u_(2)^(2))`
D. `1/2mn(u_(1)^(2)+u_(2)^(2))`

Answer

C