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Question

A uniform chain of mass M and length L lies on a horizontal table such that one third of its length hangs from the edge of the table. The work done is pulling the hanging part on the table will be

A
MgL3
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B
MgL
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C
MgL9
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D
MgL18
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Solution

The correct option is D MgL18
Work done = Change in potential energy of the hanging part of chain
W=M3.g.L6

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