How Do You Calculate Forces in a Truss System?

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genelle
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Please answer the following problem. You can post the answers here, I just want to confirm if my answers are correct. This is a truss analysis problem.


Problem:

Determine the forces in members AC, BC, BD, CD and GF for the truss shown in the figure. Indicate if the member is tension or compression. (F and E are pins)

Truss diagram with labelled joints A, B, C, D, E and F. Members run from A to B, B to C, B to D, C to D, C to F and D to F, with a 90 kN downward load at C. Dimensions shown are 3 m, 4 m, 3 m and 4 m.
 
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  • Truss diagram with joints labelled A to F, a 90 kN downward load at joint C, pin supports at E and F, and dimensions of 3 m, 4 m, 3 m and 4 m marked.
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It is best for you to show your answers and how you arrived at those answers, so we can better assist if indeed assistance is necessary. As a general rule, we don't give out answers.
 
This is a statically determinate problem. If you solve it, joint by joint, then the last joint will be a check. You don't then need us to check it. Start by getting the reaction components.