define universal gravitational constant
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The 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 gravitation and in Albert Einstein's general theory of relativity
shriyavijay:
The gravitational constant is the proportionality constant used in Newton's Law of Universal Gravitation, and is commonly denoted by G. This is different from g, which denotes the acceleration due to gravity. In most texts, we see it expressed as: G = 6.673×10-11 N m2 kg-2.
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the attractive force (F) between two point-like bodies is directly proportional to the product of their masses (m1 and m2), and inversely proportional to the square of the distance, r, (inverse-square law) between them:
F=G.m1.m2/r^2
G=6.674×10^-11 m^3/kg/s
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