In Newton's Law of Universal Gravitation, the gravitational constant G is a proportionality constant that adjusts the units of the expression to match the units of force:
[tex]F=G\frac{m_1m_2}{r^2}[/tex]Its value has bean measured as:
[tex]G=6.6743\times10^{-11}N\frac{m^2}{kg^2}[/tex]It is a constant, so it does not depend on altitude. It is not a force, but rather a constant involved in the calculation of the gravitational force. It's a "small" quantity in the sense that its order of magnitude corresponds to 10^-11.
Therefore, the correct choice is: option C) It is a very small quantity.
