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Homework Help: Spherical particles (proof)

  1. Jul 12, 2007 #1
    1. The problem statement, all variables and given/known data

    Three identical spherical particles of mass m are each located at the corners of an equilateral triangle with edge length r (each sphere is centered at each corner). Show the magnitude of the net gravitational force on any one of the particles due to the other two particles is given by:

    2. Relevant equations

    Fg = sqrt(3) Gm^2/r^2

    3. The attempt at a solution

    Again... had no idea where to start.
     
  2. jcsd
  3. Jul 12, 2007 #2
    what's the gravitational force between each pair? and then sum the 2 vectors (i.e, 2 forces acting on 1 particle) using geometry to find the magnetude of the force.
     
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