Question

why g increase as we move from the equator to the poles​

Answer 1

Explanation:

We know that the shape of the earth is not a perfect sphere. It is flattened at the poles and bulged at the equator. So the polar radius is smaller than the equitorial radius. Hence g is slightly more at the poles than at the equator.

Answer 2

Answer:

Gravity changes with altitude and we know that gravitational force is proportional to 1/R^2. ... If an aeroplane flies at a distance of 40km above the earth's surface then the gravity, g2 is calulated by equating the ratio of acceleration due to gravity, g1 and g2 to square of ratio of the radius.