GATE ME 2015 Set 2 — Question 42
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Engineering Mechanics → Statics → Trusses (Joints & Sections)
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Question
For the truss shown in the figure, the magnitude of the force (in ) in the member SR is

Correct answer
(C) 20
Solution
First, determine the reaction at support Q. Taking moments about P for the entire truss:Now, use the method of sections by cutting through members SR, TR, and TQ. Consider the equilibrium of the right-hand portion of the truss. Taking moments about node T:The force in member SR is . Thus, the correct option is (C).
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