Finding Forces in Truss Members for Solving Truss Problems

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Homework Help Overview

The discussion revolves around analyzing forces in truss members, specifically focusing on determining the forces in members FG, EG, and CH. Participants are exploring methods to approach the problem using principles of static equilibrium.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss taking moments about various points to eliminate certain forces, such as suggesting moments about point A to simplify the analysis. There is also mention of identifying zero-load members as a potential step in the process.

Discussion Status

The discussion is ongoing, with participants offering different perspectives on how to proceed with the analysis. Some guidance has been provided regarding taking moments and summing forces, but no consensus has been reached on the best approach to take next.

Contextual Notes

Participants are working under the constraints of a homework assignment, which may limit the information available or the methods they can use. The original poster expresses uncertainty about the next steps in their analysis.

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Homework Statement



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Homework Equations

The Attempt at a Solution


First i Found the external forces. Ax =0 , Ay = 8Kn, Jy=8Kn and P = -16Kn
Then i took moment about point G to eliminate FH and EG and so was able to find CH = 14.66Kn.

I am kind of stuck on how to tackle the problem further. Where should i take moment in order to find either FG or EG. Any help is appreciated. Thanks in advance!
 
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It's been a long time since I've done these - but if you take the moment about A, forces CH and FG will disappear, and all you will be left with is EG and P... right? I was never good at the method of sections, although it can save you a bunch of time.
 
First, identify the zero-load members.
 
insightful said:
First, identify the zero-load members.
Scratch that. You are asked for the forces in FG, EG, and CH, so cut your plane through those 3 members and sum X and Y forces and moments. You did moments to get CH, so now write the X and Y equations for your section.
 

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