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Homework Help: Tension with two strings and angles

  1. Sep 1, 2010 #1
    Can someone help me with this problem? I am stuck.

    So far I have:


    net Force (x) = T1cos30 - T2cos(θ) = 0

    net Force (y) = T1sin30 + T2sin(θ) - 120N - 400N = 0


    From equation 1 ---> cosθ = (T1cos30)/T2


    I attached a picture of the problem.

    Not sure my y-equation is correct

    How do I find T1 & T2
     

    Attached Files:

    Last edited: Sep 2, 2010
  2. jcsd
  3. Sep 2, 2010 #2

    rock.freak667

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    Homework Helper

    Split the two tensions into x and y components and then apply the laws for equilibrium:

    ∑Fx=0
    ∑Fy=0
    ∑M=0
     
  4. Sep 2, 2010 #3
    I set the equations up and set them equal to zero but I don't know how to solve them for any of my unknowns.
     
  5. Sep 2, 2010 #4

    rock.freak667

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    Homework Helper

    You have 2 equations with 3 unknowns, you need to take moments about a point to get a third equation.
     
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