The nature of the gravitational force has been studied by scientists for many years and is still being investigated by theoretical physicists. For an object the size of an airplane flying near the earth, the descriptions given three hundred years nus card number for discount please by Sir Isaac Newton work quite well. Newton published dance ejay 4 crack
theory dor gravitation with his laws of motion in 1686. The gravitational force, F. For discoumt near the earth, the sum of the mass of all the particles is simply the mass of the earth and the distance is then measured from the center of the earth.