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Gravitatin law

  1. Jul 13, 2007 #1
    hi i have some questions about newtons law of gravitation and i need complete answers coz these qwestion will be my second exam:
    1.the gravitational force between a ring of raduis a and mass m and a rod of mass m and length l lies on the central axis of the ring and the distance is x between them
    2.the gravitational force between a disk of raduis a and mass m and a rod of mass m and length l lies on the central axis of the disk and the distance is x between them
    by using double integral
     
  2. jcsd
  3. Jul 13, 2007 #2

    robphy

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  4. Jul 13, 2007 #3

    Kurdt

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    This is basically the same procedure Dick and I laid out for you in a previous thread. The additional considerations are the geometry of the ring and disk rather than the rod.
     
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