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Homework Help: Direction of force?

  1. Apr 19, 2012 #1
    how do I determine the direction of the force?
     

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  3. Apr 19, 2012 #2

    tiny-tim

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    the force required to keep the rod moving?

    tell us what you think, and then we'll comment! :smile:

    (what principle do you think is involved?)
     
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