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Question

Newton called G an universal gravitational constant.
But, in most of the whole universe, there is no gravitational force.
GMm/r^2 = 0
or, GMm=0
but, Mm can never be zero. Since, mass of a body cannot be zero.
Therefore, G=0
But, G = 6.67*10^-11.
Thus, a contradiction is occurring.
So, is G really an '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.


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