Question

Reasons why acceleration due to gravity varies from place to place

Answer 1

Because earth radius is not same at all places on earth because earth is not a perfect sphere.

Answer 2

Answer:

The distance between the centers of mass of two objects affects the gravitational force between them, so the force of gravity on an object is smaller at the equator compared to the poles. This effect alone causes the gravitational acceleration to be about 0.18% less at the equator than at the poles.