ENGG 202 Lecture Notes - Lecture 1: Wind Engineering, Ferrari 250
26 Jan 2015
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3d equilibrium of rigid bodies: the bent rod abef is supported in the position shown by bearings at c and d and by wire ah. The bearing at d is not capable of exerting axial thrust, while the bearing at c is. The force p = 400 n and is parallel to the y- axis. Assume the weight of the rod is negligible. Ans: mcd = 0 b) determine the support reactions at bearings c and d and the tension in the wire ah. Ans:t=230. 9 j + -400. 0 k n, d = 505. 2 j + -66. 7 k n, c = -336. 1 j + 466. 7 k. Solution strategy: draw fbd of the bar abcdef. There are 2 force reactions at d (y and z), 3 force reactions at c, and one unknown cable tension for a total of 6 unknowns. A) by summing moments about line cd, the force in the cable could be found directly (1 eqn 1 unknown).
