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Homework Help: Different Tension Problem

  1. Oct 8, 2007 #1
    1. The problem statement, all variables and given/known data
    A 20kg loudspeaker is suspended 2 m below the ceiling by two 3m long cables that angle outward at equal angles. What is the tension in the cables?

    2. Relevant equations

    3. The attempt at a solution
    cos theta = 2/3, theta=48.2 degrees
    w=mg=20kg * 9.8m/s^2 = 196N

    But the answer is 147N
  2. jcsd
  3. Oct 8, 2007 #2


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    Try drawing a FBD and see what the forces tell you.
    Last edited: Oct 8, 2007
  4. Oct 8, 2007 #3


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    You have to break this problem down into components in order to solve it.

    Hint: Since the angles are the same, the tension in both cables will be the same.
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