1. The problem statement, all variables and given/known data Four 8.0-kg spheres are located at the corners of a square of side 0.50 m. Calculate the magnitude and direction of the gravitational force on one sphere due to the other three. 2. Relevant equations F = (G*m1*m2)/r^2 3. The attempt at a solution I labeled each sphere as A, B, C, and D, like this: B C A D I chose A as my "focus," and found the force B, C, and D pulls on A. B pulls on A with: (6.67*10^-11)(8)(8) / .5^2 = 1.71*10^-8 N C pulls on A with: (6.67*10^-11)(8)(8) / .707^2 = 8.54*10^-9 N D pulls on A with: 1.71*10^-8 N Is there anything wrong with the numbers above? I don't know what to do from here on to find the magnitude of the total gravitational force and the direction (an angle measured counterclockwise from the positive x-axis) it acts in. Thanks for any help.