Estimate the gravitational force on a body of \(1.5 \mathrm{~kg}\) mass on the earth's surface, given that the radius and mass of the earth are \(6000 \mathrm{~km}\) and \(6 \times 10^{24} \mathrm{~kg}\) respectively, and the universal gravitational constant, \(G=6.672 \times 10^{-11} \mathrm{Nm}^{2} \mathrm{~kg}^{-2}\).