In the figure shown the velocity of lift is \(2 m / s\) while string is winding on the motor sha....

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In the figure shown the velocity of lift is \(2 m / s\) while string is winding on the motor shaft with velocity \(2 m / s\) and block A is moving downwards with a velocity of \(2 m / s\), then find out the velocity of block \(B\).
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Wrong solution, answer should be 8m/s upwards

devangkale