GATE ME 2015 Set 1 — Question 49
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Engineering Mechanics → Statics → Trusses (Joints & Sections)
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Question
For the truss shown in figure, the magnitude of the force in member PR and the support reaction at R are respectively

Correct answer
(C) 70.71 kN and 50 kN
Solution
1.Support Reactions:
Sum of moments about joint Q: Since is vertical and m with , the height m.
kN.
2.Force in member PR:
At joint R, consider vertical equilibrium: kN.
The magnitude is 70.71 kN.Thus, the force in member PR is 70.71 kN and the reaction at R is 50 kN.
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