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Q.

A uniform chain of length 2m is kept on a table such that a length of 60cm hangs freely from the edge of the table. The total mass of the chain is 4kg. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table  g=10m/s2

 

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An Intiative by Sri Chaitanya

a

120J

b

1200J

c

7.2J

d

3.6J

answer is B.

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Detailed Solution

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W=mgl2n2=4×10×226020060200=3.6J

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