Gravitational force is the mutual attractive force that exists between any two objects with mass. 

Any four effects of gravitational force is:

1. Gravitational force maintains the existence and position of the solar system and whole universe and its components.
2. It also helps the atmosphere to exist surrounding the earth.
3. Gravity causes weight of a body.
4. Gravity determines the future of the universe and it is also responsible for the life cycle of stars and expansion of universe.