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# Gravitation ( Key Points )

Updated: Jul 21, 2020

1. The term Gravity is derived from the Latin word gravitas, meaning "weight".

2. The Gravitational Force is directly proportional to the mass of the two objects and inversely proportional to the distance between the two objects.

3. According to the Universal Law of Gravitation, which was proposed by Newton, each object in the Universe attracts every other object no matter how light or heavy it may be.

4. Each spherical body behaves as if all its mass is concentrated at the its center.

5. Gravitational force is the weakest of all four fundamental forces found in nature.

6. Gravity of the Earth is defined as the force with which the Earth attracts all the bodies towards itself.

7. The value of the Gravitational Constant(G) is 0.0000000000667 Nm^2/Kg^2.

8. The value of Acceleration due to Gravity(g) is 9.8 m/s^2.

9. A body is said to be in Free Fall when the only force acting on the object is Gravitational Force.

10. Mass of a body is defined as the measure of its Inertia. Mass is always(generally) constant whether a person is standing on the Earth or on the Moon.

11. Weight is defined as the Force with which a body is attracted towards the Earth.

12. Weight varies from place to place and increases with an increase in the Gravity.