Gravitational force
1. Gravitational force is always an attractive force.
2. Gravitational force between two bodies is independent of the medium between them.
3. Gravitational force is a long range force.
4. Gravitational force act along the line joining the centers of the two bodies.
whereas,
Acceleration with which a body would fall freely under the action of gravity in a vacuum is known as the acceleration due to gravity. This varies according to the distance from the centre of the earth but the accepted value is 9.81 metres per second.Variations from the accepted value may occur where, for instance, there are massive ore bodies close to the surface and these anomolies are employed in mineral exploration.