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Homework Help: Beam physics help

  1. Apr 4, 2004 #1
    This is probably a real easy problem but I can not get this problem right for my life, so would someone please help me out here :redface:

    A 9m beam of mass 300 kg extends over a ledge, the beam is not attatched, but simply rests on the surface. A 75 kg student intends to position the beam so that he can walk to the end of it. Hwo far from the edge of the ledge can the beam extend?
    Last edited: Apr 4, 2004
  2. jcsd
  3. Apr 4, 2004 #2


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    The sum of the moments needs to be zero or, assuming the beam extends out to the right, positive counterclockwise.

    Can you post what you've tried so far?
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