# Explain me gravitation

We always observe that an object dropped from a height falls towards the earth and that all the planets go around the Sun as the moon goes around the earth. In all these cases, there must be some force acting on the objects, the planets, and on the moon. An apple falling from a tree is a common sight in apple-growing regions.

From these happenings, Isaac Newton could grasp that the same force is responsible for all of these. And said the earth attracts all objects towards its center and not only the earth, but every object in the universe attracts every other object. This force of attraction between two objects is called the force of gravitation or gravitational force.

Universal law of gravitation states that the gravitational force of attraction between any two particles is directly proportional to the product of the masses of the particles and is inversely proportional to the square of the distance between the particles. The direction of the force is along the line joining the two particles.

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