P 2. 4 m 4 m A B C 3 m E D Using "Method of Joints", determine the force supported by the member BC, BD and DC of the truss system shown in the figure. State whether each member is in tension or compression.
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We have joint B, joint C, and joint D. At joint B, we have two unknown forces: BC and BD. We also have the known force P acting downwards. Since the joint is in equilibrium, the sum of the forces in the vertical direction must be zero. Therefore, we can write the Show more…
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