Two particles of same mass 'm' moving wi...

Two particles of same mass 'm' moving with velocities `vecv_1= vhati, and vecv_2 = (v/2)hati + (v/2)hatj`collide in-elastically. Find the loss in kinetic energy

`sqrt(2/3) m u^(2)`

`3/4m u^(2)`

`1/3m u^(2)`

`1/8 m u^(2)`

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