You might have heard about UGC .Let's know more about it.
Actually, Universal Gravitation constant ,also referred as UGC is the gravitational force acting between two bodies of unit mass each which they are kept at a unit distance away from their respective centers. It is also denoted by scientific annotation "G".
As it's name says it is constant everywhere in the universe because the value of G is independent of the nature of the mutually attracting bodies and the properties of the medium in which they are kept.
It's value is 6.67*10^-11 Nm^2/Kg^2 .The value of G was calculated by Henry Cavendish using a highly sensitive instrument called torsion balance.
Fact: Universal gravitation constant is one of the weakest force in the nature.
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