Question

A uniform chain of length 'L' has one of its ends attached to the wall at point 'A', while $\frac { 3 \mathrm {~L} } { 4 }$ of the length of chain is lying on table as shown in figure. The minimum coefficient of friction between table and chain so that chain remains in equilibrium –

• A. $\frac { 1 } { 3 }$
• B. $\frac { 1 } { 4 }$
• C. $\frac { 3 } { 4 }$
• D. $\frac { 1 } { 5 }$

Answer 1

Answer: (B)

$\frac { 1 } { 4 }$

Answer 2

F cos 37⁰ = $\frac { \lambda L } { 4 }$ g

F sin 37⁰ = T = f

\ f = $\frac { 3 \lambda \mathrm { Lg } } { 16 }$ £ m N

̃ m ³ $\frac { 1 } { 4 }$