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A collision occurs between two identical...

A collision occurs between two identical balls each of mass m, moving with velocities `vec(u)_(1)` and `vec(u)_(2)`, colliding head-on. The coefficient of restitution is 0.5. The energy lost in the collision is:

A

`(1)/(4)m(vec(u)_(1)+vec(u)_(2))^(2)`

B

`(1)/(4)m(vec(u)_(1)-vec(u)_(2))^(2)`

C

`(3)/(16) m(vec(u)_(1)+vec(u)_(2))^(2)`

D

`(3)/(16)m(vec(u)_(1)-vec(u)_(2))^(2)`

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