A disk A of radious r moving on perfectl...

A disk A of radious r moving on perfectly smooth surface at a speed v undergoes an elastic collision with an identical stationary disk B. Find the velocity of the disk B after collision if the impact parameter is `r//2` as shown in the figure :-

`(sqrt15)/(4) v`

`(v)/(4)`

`(v)/(2)`

`(sqrt3v)/(2)`

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