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We are setting up a controlled experiment to find the coefficient of static friction between the ground at C and arm BC. You can

We are setting up a controlled experiment to find the coefficient of static friction between the ground at C and arm BC. You can neglect the weights of the two bars. Determine the minimum value of the coefficient of static friction at C so that the system is in equilibrium. (Hint: do you see any two-force members?) -20 in. B 150 lb 15 in. 40 in. 5 in.

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