Question

Why is the value of 'g' greater at the poles than the equator?

Answer 1

The value of 'g' that is gravity is greater at the poles because the gravitational pull is maximum at the poles and decreases as it comes down toward the equator.
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Answer 2

Answer:

Gravitational force is always inversely proportional to the distance between center of the earth and object under consideration. The earths shape is not in the form of a perfect sphere.

Earth has bulge at its equator due to the centrifugal force generated by earth's rotation. The distance of poles is lesser from center of earth than the distance between center of earth & equator.

Hence due to two reasons, value of g is greater at poles than equator:

1) As distance of poles is lesser

2) Due to centrifugal force.