A heavy uniform chain lies on horizontal table top. If the coefficient of friction between the chain and the table surface is 0.5, the maximum percentage of the length of the chain that can hang over one edge of the table is
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a
20%
b
33.3%
c
76%
d
50%
answer is B.
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Detailed Solution
weight of the hanging part = frictional force on the table if lnis hanging mgln=μmgl-ln 1=μn-1 μ=0.5 n=3 so 13 is hanging