Question

define gravitational constant and write its dimensional formula

Answer 1

For a system of two bodies of mass M and m separated by a distance R, attractive gravitational force

F = GMm / R²

G is a universal constant a fixed number also known as Newton's Gravitational Constant which has the same value (of 6.67 x 10^-11 Nm²/kg² _or m³ kg^-1 s^-2) everywhere in the universe. It is an important universal constant and is used to quantify the magnitude of the gravitational force exerted between two or more objects.

Dimensional formula = [M^-1L³T^-2]