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Homework Help: Suppose that three astronomical objects

  1. Oct 16, 2011 #1
    1. The problem statement, all variables and given/known data
    Suppose that three astronomical objects (1, 2, and 3) are observed to lie on a line, and that the distance from object 1 to object 3 is D. Given that object 1 has 1.5 times the mass of object 3 and seven times the mass of object 2, find the distance (in terms of D) between objects 1 and 2 for which the net force on object 2 is zero.
    ____ D m

    2. Relevant equations
    F = (G x m1 x m2) / r^2

    3. The attempt at a solution
    I drew a diagram of this, and had no luck figuring out what to do next.
  2. jcsd
  3. Oct 17, 2011 #2
    Re: Gravitation

    Does this help?

    Attached Files:

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