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Homework Help: Magnitude of torque on a door

  1. Nov 1, 2008 #1
    1. The problem statement, all variables and given/known data

    A uniform door weighs 53.0 N and is 0.9 m wide and 2.5 m high. What is the magnitude of the torque due to the door's own weight about a horizontal axis perpendicular to the door and passing through a corner?

    2. Relevant equations

    torque is equal to the perpendicular component of the force with the shortest distance between the roation axis and the point of application of the force



    3. The attempt at a solution


    i really don't know where to begin, my teacher hasn't taught this yet, even though the webassign is due tomorrow. am i using the wrong formulas?
  2. jcsd
  3. Nov 1, 2008 #2


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    Homework Helper

    Speaking generally you need to figure the distance of the Center of Mass as the point that you would have its weight act through relative to the desired axis of rotation.
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