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Introductory Physics Homework Help
What mistake did I make in finding the reaction at hinge A?
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[QUOTE="gnits, post: 6619151, member: 662480"] [B]Homework Statement:[/B] To find forces in a framework [B]Relevant Equations:[/B] Equating of forces Moments A very simple (I thought!) question: [ATTACH type="full" alt="img096.jpg"]299487[/ATTACH] I'm just looking at the first part, finding the reaction at the hinge A. Here is my annotated diagram, with the reaction and A resolved into it's X and Y components, the force at E labelled as Fe and the length of ED labelled as L. [ATTACH type="full" alt="img096_ann.jpg"]299488[/ATTACH] Considering the body as a whole: Resolving vertically: Ya = 500 Taking moments about E: Xa * L = 2 * L * 500 which gives Xa = 1000 So the resultant at A will have size sqrt(1000^2 + 500^2) = 1118 (approx.) Answer given in book is 112 N at 26.6⁰ below the horizontal. My answer is very different and also above the horizontal. What simple mistake have I made in my reasoning? Thanks. [/QUOTE]
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Introductory Physics Homework Help
What mistake did I make in finding the reaction at hinge A?
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