The apple holds ground
gravity pulls together objects of all sizes. It's easily observable in case of planets and other celestial bodies that are spaced wide apart but its difficult to observe its effects on minute masses that are kept close. Scientists at the University of Washington, usa, have verified the working of the Newtonian force between masses separated by as little as one millionth of a metre.
Newtonian theory holds valid for most situations that we come across in our daily lives. It is used to predict the motions of planets and stars. Newton calculated that the force between masses reduces in proportion to the square of the distance between them. One might ask