What are the factors that make 'g' the least at the equator and maximum at the poles?

Explanation

g' is least at equator due to
1. The equatorial radius of earth is maximum `:.g-(GM)/(R^2)`
2. Due to roatation of earth centrifugal force will act on the bodies. It oppses gravitational pull of earth on the bodies. At equator centrifugal force is maximum. So 'g' value is least at equator.
The 'g'`implies` maximum at poles due to
1. The polar radius of earth is minimum `( :. g=(GM)/(R^2))`
Centrifugal force due to rotation of earth is zero at poles. This centrifugal force reduces earth's gravitational pull.
Since Centrifugal force is zero, 'g' value is maximum at poles.