• Gravitational force is a central as well as conservative force.
•  It is the weakest force in nature.
• It is 1036 times smaller than electrostatic force and 10’l8times smaller than nuclear force.
•  The law of gravitational is applicable for all bodies, irrespective of their size, shape and position.
• Gravitational force acting between sun and planet provide it centripetal force for orbital motion.
• Gravitational pull of the earth is called gravity.
•  Newton’s third law of motion holds good for the force of gravitation. It means the gravitation forces between two bodies are action-reaction pairs.

Following three points are important regarding the gravitational force

• Unlike the electrostatic force, it is independent of the medium between the particles.
• It is conservative in nature.
• It expresses the force between two point masses (of negligible volume). However, for external points of spherical bodies the whole mass can be assumed to be concentrated at its centre of mass.

Note : Newton’s law of gravitation hold goods for object lying at very large distances and also at very short distances. It fails when the distance between the objects is less than 10-9 m i.e., ofthe order of intermolecular distances.