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!

Statics problem - too many unknowns?

  1. Apr 20, 2013 #1
    1. The problem statement, all variables and given/known data

    See attachment. Find the tension in the string that is keeping this weird contraption together. The left stick has mass m, the right stick has mass 2m. m, θ and L are known quantities.

    2. Relevant equations



    3. The attempt at a solution

    Tried starting with the right stick since there's less unknowns there. There's five forces acting upon it I think. By, Bx, T, Cy and 2mg.

    I got these equilibrium equations:

    By + Cy - 2mg = 0
    T + Bx = 0
    Cy*0.5cosθ - By*0.5cosθ - Bx*0.5sinθ = 0

    Not sure where to go from here. Having a REALLY tough time getting an intuition for statics.
     

    Attached Files:

  2. jcsd
  3. Apr 20, 2013 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    You could add the left stick.
    This will give 3 equations again, but just 2 additional unknown parameters. In total, you get 6 unknown parameters and 6 equations.
     
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: Statics problem - too many unknowns?
  1. Statics problem (Replies: 15)

  2. Statics table problem (Replies: 5)

Loading...