Q. 164.4( 7 Votes )

State Newton’s law of gravitation. Explain it.

Answer :

Universal Law of Gravitation given by Newton is called Newton’s Law of Gravitation. This law states that, “Every object in the universe attracts every other object with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.”

Suppose two bodies A and B of mass m1 and m2 be at distance r from each other.



So, according to Newton’s law of gravitation,


F …..1


And F …..2


Thus, combining equations 1 and 2 we get,


F =


Where, G = Universal Gravitational Constant


G = Nm2kg-2


Newton’s law of gravitation is called universal law of gravitation because it is applicable to all bodies having mass: whether big or small; whether the bodies are terrestrial (which are on earth) or celestial (which are in outer space) such as stones, planets and satellites.


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