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Homework Help: Tension in a string at an angle

  1. Feb 9, 2010 #1
    1. The problem statement, all variables and given/known data
    A wire of negligible mass is used to hang a 2.15 kg picture. The ends of the wire are attached to the top 2 corners of the picture. Each end of the wire forms an angle of 15.0 degrees from the horizontal. What is the tension in the wire?

    2. Relevant equations

    3. The attempt at a solution
    This is my latest and posiibly best attmept so far, but I don't have anyone to tell me if its right or not.
  2. jcsd
  3. Feb 9, 2010 #2
    It's correct
  4. Feb 9, 2010 #3
    on which wire would you like the tension for?
  5. Feb 9, 2010 #4


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    Homework Helper

    Yes it looks correct to me.

    Though you should put ΣFy=0 when the picture is in equilibrium and then rearrange to get T.

  6. Feb 9, 2010 #5
    there is only one wire with the picture connected at the two ends hanging down.
  7. Feb 9, 2010 #6
    well it looks like my brilliant self put 9.18 instead of 9.81 in my calculator and subsequently got the question wrong. Man I hate online homework so much!!!!!!!!!!!!!!!!!!!
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