Any two masses m1 and m; in the universe attract each other with a force we call gravitational force. This force is given by the formula _ mlm'z FG r2 The constant G is called the universal gravitational constant, and has a value of G = 6.67 X ICI11 12;: . The distance 1" is between the centers of the objects. This is true of anything in the universe. On the surface of the earth, the force of an object of mass 11:. receives from the earth a gravitational force equal to W = mg, with g = 9.81 8%. This is true onlyr on the surface of the earth. Using F = G mi my calculate the gravitational force between the earth and an a 10 kg object on the surface of the earth.