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Effect of centrifigual force on a gavity bound object

  1. Aug 31, 2008 #1
    is there a relation between the density of a sphere spinning at a given rate and the degree by which the minor axis shrinks?
    if there is a relation, what is it.
    thanks a lot
     
    Last edited: Aug 31, 2008
  2. jcsd
  3. Sep 1, 2008 #2

    HallsofIvy

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    That will depend very much on the elasticity of the sphere.
     
  4. Sep 1, 2008 #3
    The faster the sphere spins, the less dense the sphere is. It seems to be proportional to the length of the minor axis.
     
  5. Sep 1, 2008 #4
    assuming though that i have two spheres made of the same material, would the differing densities make a difference?
    also, i think that pixel you misunderstood. i realize that as it spins it should get more dense as the volume is shrinking, but that is not my question.
     
    Last edited: Sep 1, 2008
  6. Sep 3, 2008 #5
    I dont think gravity has much to do with it. its a GRAVITY bound sphere. it would form an ellipsoid. the denser the object the stronger the gravity so yes for any given rotation rate the degree of flattening will be less.


    i presume this is about the neutron star you mentioned in your other post.
     
  7. Sep 3, 2008 #6
    i realized that this would happen. i just do not know by how much.
     
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