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Homework Help: Getting Torque

  1. Jan 18, 2010 #1
    1. The problem statement, all variables and given/known data
    http://online.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/oldexams/exam3/sp08/fig10.gif [Broken]

    What's the net torques about the pivot, represented by the dot (•), in the diagram D. The solid arrows represent the magnitude and direction of the forces applied to the objects.

    2. Relevant equations

    3. The attempt at a solution

    I thought it's just F0 multiplied by R but it turns out to be wrong..

    Should something be considered if it's disk?
    (Because i have seen only the cases of rod getting torques)

    What's wrong in my thought?
    Please help me out here.
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Jan 18, 2010 #2


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    Your magnitude of the torque is correct, but since Torque is a vector, you must also specify its direction. Is it clockwise or counterclockwise, (or, using by convention the right hand rule, pointing into the page or out of the page)?
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