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

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7.2J

3.6J

120J

1200J

answer is B.

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Detailed Solution

W=mgl2=602004×10×602×10-2W =3.6 J

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