32 The two uniform slender bars constructed from the same stock material are fre

Question

32 The two uniform slender bars constructed from the same stock material are freely pinned together at B. Determine the minimum angle theta at which slipping does not occur at either contact point A or C. The coefficient of static friction at both A and C is Mu = 0.50. Consider only motion in the vertical plane shown. Determine, the distances to which the 90-kg painter can climb without causing the 4-m ladder to slip at its lower end A. The top of the 15-kg ladder has a small roller, and at the ground the coefficient of static friction is 0.25. The mass center of the painter is directly above her feet.

Explanation / Answer

coefficient of static friction ? = tan?

? = tan-1 (0.5)= 26o 36

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