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Torque (of a couple) and centre of gravity MCQ

  1. Jan 8, 2013 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    I know torque of a couple = One of the forces x the distance between the 2 forces.

    3. The attempt at a solution

    I don't know how to approach this blasted problem. Any help would be very much appreciated.
  2. jcsd
  3. Jan 8, 2013 #2

    Doc Al

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    Staff: Mentor

    What torque does the weight of the cube exert about that axis?
  4. Jan 9, 2013 #3


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    Science Advisor
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    Gold Member

    What do you know about the forces (or torques) acting on an object that isn't moving or which you don't want to move (or rotate)?
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