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Wind mill damage

  1. Jun 13, 2012 #1
    I have a weird question that I can't figure out where to start. It's been a while since physics:

    A wind mill has a hub and 3 blades the hub weights 45000 lbs and each blade weighs 14000 lbs. the CG is at the hub when the assembly is intact.

    We had a storm and 2 of the 3 blades broke so where is the new CG? i can't remember how to figure this out.
  2. jcsd
  3. Jun 13, 2012 #2


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    Science Advisor

    The position of the center of gravity is the weighted average of the positions of the centers of gravity of the remaining pieces.

    The weight being the mass of each piece, of course.

    So your first challenge is to figure out the location of the center of gravity of the remaining arm.
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