1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Statics, truss anaysis

  1. Sep 14, 2011 #1
    1. The problem statement, all variables and given/known data
    Here is a link to a picture of the problem
    http://img571.imageshack.us/img571/374/truss.jpg" [Broken]
    I have to find the forces in the members marked with an x.
    2. The attempt at a solution
    I found the support reactions, but I'm not sure if I need them. Should I try to find the lengths of the members and the angles between them next?

    truss analysis*
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Sep 14, 2011 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    It is always best to find the joint reactions first. Then whether you solve for the member forces by joints or sections, you yes need the angles/lengths
  4. Aug 6, 2012 #3
    If you are still having trouble, try to solve node G using these:
    G[y]=0= -20 + EG[y]
    G[x]=0= -20 + FG + EG[x].
    Then it should be easy enough to start working your way down.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook