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Homework Help: Tension Problem

  1. Sep 29, 2004 #1
    Ok this is the problem

    The distance between two telephone poles is 50.5 m. When a 1.40 kg bird lands on the telephone wire midway between the poles, the wire sags 0.203 m. How much tension does the bird produce in the wire?

    This is what I did

    I divided 50.5/2 = 25.25m (to get length of one leg)
    The other leg is = .203 m

    So, Length of Hypotenuse = 25.2508

    Weight of the bird = (9.81 * 1.40) = 13.734 N

    Now to solve the problem I did the following

    (Weight of the bird/ the distance of the wire sagged) * the hypotenuse

    To get the tension

    so, the tension is = 1708.35 N

    But this is not the right answer, so can anyone tell me what I am doing wrong?
  2. jcsd
  3. Sep 29, 2004 #2


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  4. Sep 29, 2004 #3
    Yep got it.. I don't know why I was ignoring the angles.

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