What is the gravitational force between two football teams standing at the line of scrimmage? (Assume that in this position all eleven players are standing shoulder to shoulder and that the teams form parallel lines. Take the center of mass to be at the center person of the team and the centers of mass of the two teams to be 1m apart. The average mass of the players is 110 kg.) G=6.67*10-11 N*m2/kg2.
Using the Law of Universal Gravitation gives
Note that this force exists independently of other gravitational forces in the system.
