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A uniform chain of length 2 m is kept on...

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 on the table?

A

7.2 J

B

3.6 J

C

120 J

D

1200 J

Text Solution

Verified by Experts

The correct Answer is:
B
Mass per unit length `=(4kg)/(2m)=2kgm^(-1)`
Mass of 60 cm length `=1.2 kg`
weight of hanging part `=1.2xx10=12N`
`W=FxxS=12xx0.3=3.6J`
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