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Homework Help: Is this a center of mass question?

  1. Feb 26, 2004 #1
    Question: Find the solid angle subtended at the origin by a thin circular disk of radius a, whose cente is a distance b from the origin and where the normal to the disk is parallel.

    Do I have to find the center of mass to solve this question?
     
  2. jcsd
  3. Feb 26, 2004 #2

    Tom Mattson

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    "is this a center of mass question?"

    No, it's a "solid angle" question.

    This question is purely geometrical, and has nothing to do with distriubtion of mass.
     
  4. Feb 26, 2004 #3
    so....

    how would I do it?
     
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