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Homework Help: Torque multiple choice question needing explanation

  1. Nov 24, 2012 #1
    1. The problem statement, all variables and given/known data

    If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot.

    a. False
    b. unable to decide without knowing shape of object
    c. True

    2. Relevant equations


    3. The attempt at a solution

    My logic told me that a greater distance r from the point of rotation equals a greater torque. The above equation makes this obvious. So I selected true and got marked incorrect, the answer is false. I feel that I was right or the question is misleading at best. Anyone care to weigh in?

  2. jcsd
  3. Nov 24, 2012 #2


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    Staff Emeritus
    Science Advisor
    Homework Helper

    Welcome to Physics Forums.

    The expression "r x F" is not simply "distance multiplied times force". Do you see what the difference is?
  4. Nov 24, 2012 #3
    uh, Obviously not. Does it have to do with it being a vector cross-product equation?
  5. Nov 24, 2012 #4
    I think I get it now. Thank you for your generous and abundant guidance.
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