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Homework Help: Torque beam problem?

  1. Sep 10, 2008 #1
    Torque beam problem????????

    | \
    | \ rope
    | \
    | \
    |wall \
    | \
    x |w

    a beam is being held up by the rope due to the friction of the wall. the beam has a weight W, and a man is standing x distance away from the wall. the coefficient of friction with the wall is 1/2, the angle is 37*. what is the maximum distance towards the wall that the man can stand without falling.

    i dont know how to start, the only thing i can think of is to use the torque at the angle =[

    pic got messed up, rope on angle, wall on left
  2. jcsd
  3. Sep 11, 2008 #2


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    Science Advisor
    Homework Helper

    Hi gnsdraw! :smile:

    (hmm … use CODE tags … :wink:)
    Code (Text):

    | \
    |  \ rope
    |   \
    |    \
    |wall \
    |      \
    x |w
    Hint: call the normal force N the friction force F and the tension force T.

    When the beam is about to slip, F/N will be exactly 1/2, won't it? :wink:

    So take horizontal and vertical components of all the forces acting on the beam. :smile:
  4. Sep 11, 2008 #3
    Re: Torque beam problem????????

    so along with fric force and tension, there are also gonna be two weights? could anyone show me how to set the torques up
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