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Gravitation   Gravitational force Every object present in the universe attract each other if any object is thrown upward it falls downwards towards the earth with gravitational force. Every object present on Earth is attracted by another object on earth or with the force that force is known as gravitational force. The universal law of gravitation or Newton's law of gravitation. Consider two objects of mass M and m are separated by a distance d. According to universal law of gravitation, the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Importance of gravitation or the gravitational force 1. The gravitational force is responsible to bind the atmosphere. 2. It is also responsible for the rainfall and the snowfall. 3. It is also responsible for the solar and lunar eclipse. 4. It is also responsible for falling off all the object towards the earth. 5. It is also responsible for...