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System is shown in the figure and man is pulling the rope from both sides with constant speed `u` find the speed of the block.A. `(3u)/(4)`B. `(3u)/(2)`C. `(u)/(4)`D. none of these

Answer» Correct Answer - A
`u=(0+v_(1))/(2),(v_(1)+v_(2))/(2)=v,(-v_(2)+u)/(2)=v`
Hence `v=` velocity of `M=(3u)/(4)`.


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