AB is an L shaped obstacle fixed on a ho...

AB is an L shaped obstacle fixed on a horizontal smooth table. A ball strikes it at A, gets deflected and restrikes it at B. if the velocity vector before collision is `vec(v)` and coefficient of restitution of each collision is 'e', then the velocity of ball after its second collision at B is

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AB is an L shaped obstacle fixed on a horizontal smooth table. A ball strikes it at A, gets deflected and restrikes it at B. if the velocity vector before collision is `vec(v)` and coefficient of restitution of each collision is 'e', then the velocity of ball after its second collision at B is

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