Finding Forces in Truss Members for Solving Truss Problems

[VectorA]

Homework Statement

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!

 

[EJC]

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.

 

[insightful]

First, identify the zero-load members.

 

[insightful]

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.