Q. 164.4( 7 Votes )
State Newton’s law of gravitation. Explain it.
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,
And F …..2
Thus, combining equations 1 and 2 we get,
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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