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Standing without leaning

  1. Sep 5, 2011 #1
    sit in a straight backed chair and try to stand without leaning. you are not able to do it .
    why is it impossibe?
     
  2. jcsd
  3. Sep 5, 2011 #2

    rcgldr

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    Because your center of mass is well behind the point of conact between your feet and the floor. If the friction was high enough that neither the chair or your feet would slide, then the person could stand up by pushing forward with this feet against the floor and backwards with his legs against the chair to generate a torque.
     
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