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Determining tension in strings

  1. Oct 4, 2010 #1
    1. The problem statement, all variables and given/known data
    An object of mass 100kg is hanging from a ceiling by means of 2 strings. The 1st string (t1) makes an angle of 55 degree with the horizontal-right. The scond string 9T-2) makes an angle of 25 degree with horizontal left. Calculate tension in the first string (T1)

    2. Relevant equations
    w = m|g|

    wx = w cos θw

    wy = w sin θw =

    T1x = T1 cos θT1 =

    T1y = T1 sin θT1 =

    T2x = T2 cos θT2 =

    T2y = T2 sin θT2 =

    T1x + T2x + wx =

    T1 =

    T1y + T2y + wy =

    3. The attempt at a solution
    I am stuck on this question. i have tried plugging in for the equations and none of the answers I have come up with are close to any of the choices. My professor is no help. Someone please explain this to me
  2. jcsd
  3. Oct 4, 2010 #2


    User Avatar
    Gold Member

    Try drawing a free body diagram of the forces acting on the block. Then, sum the forces in the x and y directions. You should have two expressions with which you can solve for T1.
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