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Question

A homogeneous chain of length L lies on a table. Some part of chain is hanging down the table. The coefficient of friction between the chain and the table is μ. The maximum length which can hangover the table in equilibrium is :
1017709_691c2457b4964b0b80a173092785da7e.png

A
μL1+μ
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B
(1μμ)L
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C
(1μ1+μ)2
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D
(2μ1+2μ)L
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Solution

The correct option is A μL1+μ
Let m be the mass of the chain.
Force pulling the chain down=mLxg
Friction Force=μmL(Lx)g
mLxg=μmL(Lx)g.
x=μL1+μ

1134677_1017709_ans_db73f6c21f804d6fa773221cf1095d3b.png

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