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Q.

A uniform chain of length 2 m is lying on a horizontal table top with a length ‘x’ hanging over the edge of the table. If coefficient of static friction between the table top and the chain is 0.6, the maximum value of ‘x’ is

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a

0.9 m

b

0.65 m

c

0.75 m

d

0.85 m

answer is C.

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Detailed Solution

If λ be the mass per unit length of the chain, then λxg=μ×λl−x.g⇒x=μl1+μ=0.6×21+0.6=1.21.6m=34m=0.75 m

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