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Homework Help: Tension in cables

  1. Oct 23, 2013 #1
    1. The problem statement, all variables and given/known data

    A 1000N beam is loaded with a 2000N filing cabinet and supported by two cables. If the beam is 8 meters long and the filing cabinet is 2 meters from the left cable, what is the tension force in each cable?

    2. Relevant equations

    T= F /d

    3. The attempt at a solution
    For the left cable I tried T= 2000 N / 2 m. This answer was incorrect though.
  2. jcsd
  3. Oct 23, 2013 #2


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    hi astru025! :smile:

    What point did you take moments about? :confused:
  4. Oct 23, 2013 #3
    I wasn't sure what point to take moments about... So I didn't take my moments about any certain point. What point should I use? And also I'm not very familiar with the point subject... It is no where in my notes/ or book.
  5. Oct 23, 2013 #4
    Could you elaborate on the question more or is that just given? Plus could you show what you tired to do along with what was said at the back of the book?

    edit: Also any angles given or the dimenssion of the cabinent in question?
    Last edited: Oct 23, 2013
  6. Oct 23, 2013 #5


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    ahhh … that explains it! :biggrin:

    ok, take moments (of all forces) about the right-hand end of the beam

    show us what you get :smile:

    (we'll discuss why to choose that point when you've done it)
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