moments and forces, Mechanical Engineering

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3. A string of length l is fastened to two point A and B at the same level at a distance ‘a’ apart. A ring of weight W can slide on the string and a horizontal force P is applied such that point ‘C’ is in equilibrium vertically below B. Show that P = Wa/l and that the tension in the string is W(l2 + a2) / 2l

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