Question: A rigid bar ABCD is pinned at point B and supported by springs at A and D (see figure). The springs at A and D

A rigid bar ABCD is pinned at point B and supported by springs at A and D (see figure). The springs at A and D have stiffnesses k1 = 10 kN/m and k2 = 25 kN/m, respectively, and the dimensions a, b, and c are 250 mm, 500 mm, and 200 mm, respectively. A load P acts at point C.
If the angle of rotation of the bar due to the action of the load P is limited to 3°, what is the maximum permissible load Pmax?

a=250 mm | b 500 mm c = 200 mm k2 25 kN/m 1 10 kN/m

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