A cord is used to lower vertically a block of mass M,a distance d, at a constant downward acceleration g/4. Then work done by cord on block
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Answer:
-3Mgd/4
Explanation:
Let T be the tension in the string.
Mg - T =Mg/4
T = Mg - Mg/4
T = 3 Mg/4
Therefore, W = -T × D
= -3Mg/4 ×d
= -3Mgd/4
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