Question: 9 - 7 1 . The ladder is supported on the rough surface at A and by a smooth wall at B . If a

9-71. The ladder is supported on the rough surface at A and by a smooth wall at B. If a man weighing 675 N stands upright at C, determine the principal stresses in one of the legs at point D. Each leg is made from a 25-mm-thick board having a rectangular cross section. Assume that the total weight of the man is exerted vertically on the rung at C and is shared equally by each of the ladder's two legs. Neglect the weight of the ladder and the forces developed by the man's arms.
Prob. 9-71
9 - 7 1 . The ladder is supported on the rough

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