Mass and radii of earth is 81 times and 4 times greater than that of moon. Compare value of acceleration due to gravity on their surface.

What is the value of the acceleration due to gravity on the surface of the earth ?

Does acceleration due to gravity depend on mass?

what is the value of acceleration due to gravity at the centre of the earth ?

What is the value of the acceleration due to gravity at the centre of the earth ?

The average density of the earth is 5500kg*m^(-3) the gravitational constant is 6.7xx10^(-11)N*m^2*kg^(-2) and the radius of the earth is 6400 km. Using the given values, find the magnitude of the acceleration due to gravity on the surface of the earth.