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Homework Help: How heavy would you be on neuron star

  1. Sep 9, 2005 #1
    I have a problem that I can't figure out, as do most people I guess, so here goes. A neutron star is 1,000 times smaller than the earth and has 450,000 times the mass of the earth. How many times heavier would you be on the surface of a neutron star?
     
  2. jcsd
  3. Sep 9, 2005 #2

    David

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    Here are the steps you need to get to the answer... Your weight is your mass times the gravitational field strength. [tex]W=mg[/tex]. [tex]g[/tex] depends on the mass and radius of the object like this: [tex] g = \frac{GM}{r^2} [/tex]

    So for a particular person, their weight will scale as the mass of the planet/star and inversely with the radius squared. i.e. your mass will be greater by a factor of 450,000 due to the mass difference and greater by an additional factor of (1000)2 due to the smaller radius.
     
    Last edited: Sep 9, 2005
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