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Homework Help: Newtonian Gravity questions

  1. Mar 23, 2008 #1
    Before I inundate you with various elementary problems I'm facing, I need help with the concept.

    Fgrav=(GMm)/(r^2)

    So Fgrav is in units of Newtons, correct? How would one convert that to m/s?
     
  2. jcsd
  3. Mar 23, 2008 #2
    Gravity is just a force an object with mass experiences, which can be translated to acceleration with Newton's 2nd Law, F=ma. It has nothing to do with velocity (which has units m/s). However you can turn it into units of m/s^2, which is the units of acceleration with the above mentioned law: a=F/m, therefore:
    [tex]
    a_{gravity}=\frac{GM}{r^2}
    [/tex]

    Where M is the mass of the object that is creating the gravitational field, not the "accelerating object".
     
    Last edited: Mar 23, 2008
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