Gravitation


 
 
Concept Explanation
 

Gravitation

It has been observed that an object dropped from a height falls towards the Earth i.e. earth pulls everything towards itself. Newton generalized this idea and said that not only earth but every object in the universe attracts every other body. This force of attraction between two objects is called the force of gravitation or gravitational force.

Gravitation:

It is defined as the non contact force of attraction between any two bodies in the universe. The earth attracts (or pulls) all objects lying on or near its surface towards its centre. The force with which the earth pulls the objects towards its centre is called gravitational force of the Earth or gravity of the Earth.All the objects in the universe attract each other with a certain amount of force, but in most of the cases, the force is too weak to be observed due to the very large distance of seperation Besides, gravity's range is infinite but the effect become weaker as objects move away.

This force of attraction was first observed by Sir Isaac Newton  and was presented as Newton's law of gravitation in the year 1680. However, gravitation can generally exist in two main instances.

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Sample Questions
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Question : 1

Gravitational Force is an example of _________________.

Right Option : C
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Question : 2

Which of the following is incorrect:

1. It has been observed that an object dropped from a height falls towards the Earth i.e. earth pulls everything towards itself.

2. Newton generalized this idea and said that not only earth but every object in the universe attracts every other body.

Right Option : D
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Question : 3

Which of the following is not an example of gravitational force.

Right Option : D
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