General objective of this lecture is to present on Gravitational Force. Gravitational force; Increases with Mass and Decreases with Distance. All objects in the universe are attracted to each other by the force of effort, friction, gravity and inertia. Gravitation is a force of attraction between all objects in the universe. All objects in the universe are affected by the forces of gravitation. Gravitational forces depend on the mass of objects and the distance between them. The larger the object is, the stronger its gravitational force.