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Homework Help: Sum of torques

  1. Dec 4, 2011 #1

    I am working on this problem, which I have uploaded as a picture.
    I have a question to the sum of torques.

    Is there somebody how can explain me where all the sines and cosines comes from.
    I am not so good to the find sum of torques.

    Attached Files:

  2. jcsd
  3. Dec 5, 2011 #2


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    Homework Helper

    Well, first start by calculating the individual torques.
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