A uniform, long thin chain of length l, with one end attached to a horizontal axle of cross-sectional radius r (r <<l), is hung vertically down initially. The chain is then wound up slowly on the axle, doing an amount of work W 1 . The chain is then cut into two equal parts (with length 
each) and the two parts are wound one after the other on the same axle doing an amount of work W 2 and W 3 respectively, The ratio 
is -
A
1
B
C
D
2
Text Solution
Verified by ExpertsThe correct answer is:
D
W 1 = mg 
, W 2 = 
, W 3 = 
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