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: Static equilibrium, tension and compression

  1. Apr 18, 2016 #1
    1. The problem statement, all variables and given/known data
    The figure below shows a light truss formed from three struts lying in a plane and joined by three smooth hinge pins at their ends. The truss supports a downward force of Farrowbold.gif = 1 330 N applied at the point B. The truss has negligible weight. The piers at A and C are smooth.

    The beams make a triangular bridge over a gap without friction at the joints or contact points to simplify it

    For part A the Theta on the left is 29.5 and the right is 44.0, Find the contact forces on each side of the gap. I've done this.
    The contact force on the left side is 491N
    Right side is 839

    For part B it asks for the tension or compression of the three beams.

    2. Relevant equations
    Net torque for part A and using h/tan(theta) for the lever arms since lengths were not given

    3. The attempt at a solution

    I've tried looking at the vector component that is in line with the right side and that does not work. I tried the same with adding the part of the contact force that acts on the right beam. I though about net force but there aren't any in the x direction
  2. jcsd
  3. Apr 18, 2016 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    No figure was attached. :frown:
  4. Apr 18, 2016 #3
    sorry, forgot
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted