1. Not finding help here? Sign up for a free 30min 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!

Static equilibrium in 3D

  1. Sep 24, 2011 #1
    Been working on this problem

    http://www.flickr.com/photos/archiphoto77/6179533925 [Broken]
    (SEE LINK FOR PHOTO OF PROBLEM)

    for quite some time now, and the components don't quite add up for me so im just a tad exasperated... In the x-z projection, I see two forces acting along the x-axis---one being 100cos15 in the -x direction, and the other being Pcos30 in the +x direction. Naturally, all projections of this 3d object should provide equilibrium in all directions. I know that P is equal to 50N, but it just doesnt add up when i take the sum of forces in the xdirection for the x-z projection. Help!

    For potential reverse engineering purposes, the solution to the problem is P=50N, Ay=108.8, Cy=58.1 and By=32.4
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Sep 26, 2011 #2

    rude man

    User Avatar
    Homework Helper
    Gold Member

    ∑Fx = 0
    ∑Fy = 0
    ∑Fz = 0

    ∑Torques about x axis (thru C) = 0
    ∑Torques about z axis (thru B) = 0
    ∑Torques about z axis (thru A) = 0

    One of the last two equations may turn out to be redundant.

    Anyway, that should give you n equations and n unknowns.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Static equilibrium in 3D
  1. Static: Equilibrium 3D (Replies: 10)

  2. Statics (Equilibrium) (Replies: 1)

Loading...