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!

Trusses (forces)

  1. Jul 3, 2016 #1
    from the calculation of F(AD), the force should point towards A,right? (red arrow)
    but, in the calculation of F(AB), the (1/sqrt rt2)(48.08) should be positive,right? (which is pointing towards LEFT)???
    2. Relevant equations

    3. The attempt at a solution
    this involve the resolution of forces into vertical and horizontal axes,am i right?
  2. jcsd
  3. Jul 3, 2016 #2


    User Avatar
    Science Advisor

    Positive X is rightward, as the equation HA -28 = 0 defined at the start of the solution.
    Member AD was found to be in compression and so exerts a leftward force at joint A, so the term 1/(√2)(48.08) is negative.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Trusses (forces)
  1. Truss problem (Replies: 1)

  2. Forces in truss (Replies: 12)