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A uniform chain of length $2 \mathrm{~m}$ is kept on a table such that a length of $60 \mathrm{~cm}$ hangs freely from the edge of the table. The total mass of the chain is $4 \mathrm{~kg}$. What is the work done in pulling the entire chain on the table?
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The correct answer is:
$3.6 \mathrm{~J}$
$3.6 \mathrm{~J}$
Work done $=\mathrm{mgh}=1.2 \times 0.3 \times 10=3.6 \mathrm{~J}$
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