Finding Forces in Truss Members for Solving Truss Problems

AI Thread Summary
The discussion focuses on solving for forces in truss members, specifically FG, EG, and CH. The user has calculated external forces and determined the force in member CH to be 14.66 kN by taking moments about point G. They seek guidance on how to proceed with finding forces in FG and EG, considering the method of sections. It's suggested to cut the plane through the three members and sum the X and Y forces and moments to find the required values. The conversation emphasizes the importance of identifying zero-load members to simplify the analysis.
VectorA
Messages
35
Reaction score
0

Homework Statement



u7MCJe0.png

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!
 
Physics news on Phys.org
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.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

How Are Reaction Forces Calculated in a Hinged Beam and Strut System?
Replies
1
Views
5K
Statics: Statically Indeterminate Unstable Plane Truss
Replies
4
Views
5K
Solving Simple Truss Problem: Find Reaction Force at A
Replies
10
Views
4K
Need help on some questions - Moments, Bearings & Trusses
Replies
3
Views
3K
Finding Forces in Truss Members Using Method of Sections
Replies
3
Views
2K
What Are the Forces in Truss Members BH and HG?
Replies
5
Views
1K
Solving Truss Problems: Finding Unknown Forces | Learn Mechanics
Replies
5
Views
2K
Understanding Statics Analysis for a Simple Square Truss Design
Replies
3
Views
1K
What are the components of the reaction force at A for a truss bridge?
Replies
2
Views
2K
Statics: bad solution to simple truss problem regarding determinancy
Replies
5
Views
5K

Hot Threads

Recent Insights

Back
Top