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[" 3".A small ball moves toward right wi...

[" 3".A small ball moves toward right with a velocity "V" .It collides with the "],[" wall and returns back and continues to and fro motion.If the average "],[" speed for first to and fro motion of the ball is "((2)/(3))V" ,then the coefficient "],[" of restitution of impact is : "],[[" (A) "0.5," (B) "0.8," (C) "0.25," (D) "0.75]]

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