Why gravitational constant is the universal constant?
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Solution
Because universal gravitation constant G is independent of
Medium between the two bodies
Masses of the two bodies
Distance of separation between the two bodies
Its value remains the same in the entire Universe.
The value of G = 6.67 x 10-11 N m2/kg2.
The gravitational constant (also known as the "universal gravitational constant", the "Newtonian constant of gravitation", or the "Cavendish gravitational constant"), denoted by the letter G, is an empirical physical constant involved in the calculation of gravitational effects in Sir Isaac Newton's law of universal.