Characteristics of Gravitational Force
2. It is directly proportional to the product of the masses of the two bodies.
3. It obeys inverse square law. It is a long range force and does not need any intervening medium for its operation. Gravitational force between two bodies does not depend upon the presence of other bodies.
4. It is the weakest force known in nature. It is a central force (i.e., it acts along the line joining the centres of the two bodies). It is a conservative force (i.e., work done in moving a body against the gravitational force is path independent). Gravitational- force between two bodies is thought to be caused by an exchange of a particle called graviton.