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Find the mass by dividing by gravity?

  1. Nov 22, 2003 #1
    I'm a bit curious and confused. In genereal problems, when they say that something weighs #Newtons, can you just find the mass by dividing by gravity?
  2. jcsd
  3. Nov 22, 2003 #2


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    Re: Weight

    You have to say what you mean by "gravity". If you mean the acceleration of gravity, then the answer is yes: Mass equals weight divided by acceleration of gravity.
  4. Nov 22, 2003 #3


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    Yes, divide the weight in Newtons by g, [tex]9.8 \frac{m}{s^2}[/tex] to get the mass in kg. This of course assumes that you are on the surface of the earth.
    Last edited: Nov 22, 2003
  5. Nov 22, 2003 #4


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    Staff: Mentor

    ...and in a place where G = 9.8. It varies by more than most people realize (more than I realized until someone brought it up a month ago here).
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