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Gravity and Gravitation
Gravity and Gravitation The force by which the Earth pulls objects downwards towards its center is called the force of gravity. Due to the force of gravity, all the objects dropped from a point above the Earth's surface, fall downward. Even if we project a ball upwards, it returns back on the Earth due to force of gravity. No matter where a body is placed, the Earth's pull is directed towards the center of the Earth. It is this force of gravity which enables us to stand on any part of the Earth's surface i.e. Nepal or Austria.
The word gravity is used to explain the pull of the Earth and gravitation to the force between any two bodies in the universe.
Sir Issac Newton discovered that any object on Earth's tends to go towards the centre of the Earth. Similarly all the planets are
attracted towards the sun and they can not go off the sun. In 1686, Newton published the low of attraction which subsequently became the Newton's law of gravitation.The gravitational attraction is not only confined to the Earth and the object on it but also applies to the bodies like stars, comets and many other heavenly bodies. Because of this gravitation, the moon revolves around the Earth in its orbit and the Earth goes round the sun. Gravitational property is present in all objects whether they are small or large.
Gravitational Law
