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Homework Help: Question on Newton's law of universal gravitation

  1. Oct 18, 2012 #1
    1. The problem statement, all variables and given/known data
    The force of gravity on a spacecraft some distance from Earth is 900 N. What will be the force of gravity on a spacecraft with twice the mass, at a distance from Earth’s centre that is as far?
  2. jcsd
  3. Oct 18, 2012 #2


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    Gold Member

    Please read the forum rules about how to post homework problems. You have to show some attempt to solve it yourself so folks will know where you are stuck.
  4. Oct 18, 2012 #3
    Well all i know is that M2=2M1
    Fe= 900 N
    D2= 1/4D1

    i don't know what to do next.. i am totally stuck..
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