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Push up weight distrubtion problem

  1. Dec 6, 2007 #1
    1. The problem statement, all variables and given/known data

    While doing push ups part of the weight of an 80kg young man is supported by his hands and part by his feet. His center mass is located 60cm from his hands and 1m from his feet. (The hand ot feet distance is 1.6m) How much of the total weight is supported by his hands? How much of the weight is supported by his feet? Use the feet as the pivotal point.

    2. Relevant equations


    3. The attempt at a solution

    I don't even know where to start...It's just completely escaped my mind. This was a question on a test we had last week and I'm quite anxious to figure out how to do it.
  2. jcsd
  3. Dec 6, 2007 #2
    You need to use the forces and the torques to figure this out.

    Knowing that the forces of the hands and feet are equal to the weight and that the torques likewise cancel out, you should have 2 equations and 2 unknowns.
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