What is the value of acceleration due to gravity (g) on earth?

9.8 ms^-2

To calculate the value of g, we should put the values of G, M and R, namely,

universal gravitational constant, G = 6.7 × 10^–11 N m² kg^-2,

mass of the earth, M = 6 × 10²⁴ kg, and

radius of the earth, R = 6.4 × 10⁶ m

g = \(\frac{GM}{R^2}\) = \(\frac{6.7 × 10^{-11} × 6 x 10^{24}}{(6.4 × 10^6)^2}\) = 9.8 ms^-2