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On a smooth carrom board. A coin located...

On a smooth carrom board. A coin located at `(4,6)` is moving in negative `y-`direction with speed `3m//s` is being hit at that point by a striker moving along negative `x-` axis . The line joining centre of the coin and striker just before the collision is parallel to `x-` axis. After collision the coin goes into the hole located at origin. Mass of the striker and the coin is equal. Considering the collision to be elastic, find the velocity `(` in vector form `)` of the stricker before the collision and after the collision.

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