John stands against one wall of a square room with walls of length 4m each. He kicks frictionless perfectly elastic ball in such a way that it bounces off the three other walls once each and returns to him the distance travel by ball is y2^1/2 then y is equal to
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Step-by-step explanation:
For the moving wall, if the ball speed is Vb and the wall speed is Vw then the collision speed is (Vb + Vw) and the rebound speed is - (Vb + 2 Vw) (using a fixed frame of reference). In the pdf file, V is used for the wall speed, and v is used for the ball speed, and it's noted
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