What is the value of acceleration due to gravity (g) on earth?
Answer & explanation
Correct answer: option 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