Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.48 m. Two of the spheres have a mass of 2.18 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert on each other, what is the magnitude of the initial acceleration of the third sphere? Thats the question I know that some how I have to use the equations F=G(m1m2/d^2) but besides for that I don't know. I know I probably the force towards one sphere planet and then separate that vector into x and y and then double that to include both sphere but I am still very confused. Thanks in advanced.