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Physics: Torque and static equilibrium

  1. Jul 16, 2008 #1
    I don't like writing formulas on the computer, so i just scanned my attempt.

    [​IMG]

    In my working out, i incorrectly use the mass of 21kg for the light, it's actually 21.5kg....but either way my working out is still incorrect.

    Thanks in advance, Frantelle.
     
  2. jcsd
  3. Jul 16, 2008 #2
    Look closely at the diagram, does the tension in the cable actually have a component in the y-direction?
     
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