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I have a dumb question about gravitational fields

  1. Nov 18, 2014 #1
    Is a one-dimensional gravitational field possible? I'm not sure if I'm using the correct terminology, what I mean is instead of pulling things into its center of gravity it pulls things in the same linear direction until it ejects it out.
    Last edited by a moderator: Nov 18, 2014
  2. jcsd
  3. Nov 18, 2014 #2


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    Perhaps I'm not understanding the question you're asking, but the gravitational force does act one dimensionally!

    Newtons law of gravity gives us:

    ## F = \frac{G M1 M2}{r^2} ##

    It is only dependent on the distance the two bodies are from each other ##r##, not their angles relative to each other (which would introduce a ##\phi## and ##\theta## dependence).
    Last edited: Nov 18, 2014
  4. Nov 18, 2014 #3


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    This is one way to look at it.

    Another way is from the field equation point of view of gravity, a la Gauss' law
    [tex] \vec{\nabla} \cdot \vec{G} = - 4 \pi \rho [/tex]

    In one dimension, from this equation a point source simply generates a constant gravitational field (does not vary with distance from the point mass).
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