Work, Energy and Power

Question: A cord is used to lower vertically a block of mass M by a distance d with constant downward acceleration $\frac{g}{4}$. Work done by the cord on the block is

1) $Mg\frac{d}{4}$

2) $3Mg\frac{d}{4}$

3) $ - 3Mg\frac{d}{4}$

4) Mgd

Solution:

Explanation: No Explanation

WEP Work Done by Variable Force

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