If earth is taken as a sphere of radius 6400 km and mass `6xx10^(24)` kg, what would be the value of g on the surface of earth ?

Explanation

Here, `R=6400 km=6.4xx10^(6)m`
`M=6xx10^(24) kg`
As `g=(GM)/R^(2)=(6.67xx10^(-11)xx6xx10^(24))/(6.4xx10^(6))^(2)=9.8m//s^(2)`