The coefficient of static friction ${}_s$ is the same between block $B$ and the horizontal surface and between the rope and support $C.$

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Problem $08\mathrm{.}108.$b $-$ Belt friction

Knowing that $m_A=m_B,$ determine the smallest value of ${}_s$ for which equilibrium is maintained. $($Round the final answer to three decimal places.$)$

The smallest value of ${}_s$ for which equilibrium is maintained is $0\mathrm{.}457$