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Homework Help: Free fall

  1. Jan 20, 2010 #1
    1. The problem statement, all variables and given/known data

    How can I find mass when weight and distance is given.(Note I can't use 9.8m/s^2 as my acceleration of gravity because the question is dealing distances that are extremely high from earth's surface.And also how can i find the right acceleration at such heights?

    2. Relevant equations

    F=ma

    3. The attempt at a solution
    am stuck cos I know i can't use 9.8m/s^2.
     
  2. jcsd
  3. Jan 20, 2010 #2
    Have you come across newton's theory of gravitation?
    [tex]F_{g} = \frac{Gm_{1}m_{2}}{r^2}[/tex]
     
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