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[" 20.I ball of mass "m" moves with spee...

[" 20.I ball of mass "m" moves with speed "v" and strikes a wall "],[" having infinite mass and it returns with same speed then the "],[" work done by the ball on the wall is "quad [" BCECE "2004]],[[" (a) Zero "," (b) "mvJ],[" The leined."," (d) "v/mJ]]

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