Question

why does gravitational accelaration decreases as we move towards the poles from equator?

Answer 1

The radius of the earth R decreases when we go from the equators to the poles. Hence, the value of acceleration due to gravity g increases because value 'g' is inversely proportional to the radius of earth.

$\mathrm{g}=\frac{\mathrm{GM}}{{\mathrm{R}}^2}$

As R decreases,the value of 'g' increases because G and M are constant.