Question

why the value of 'g' is highest at the pole and lowest at the equator?​

Answer 1

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The value of G is maximum at the poles. This is due to the closeness between the poles and the center of the earth.

Answer 2

Answer:

There are mainly three factors which contribute to the maximum gravity at pole and minimum at equator:

1. Radius of equator : As Earth is flattened at the pole , radius of the equator is greater than radius of the pole. Since gravity is inversely proportional to the radius. This factor reduces the net gravity at equator compared to the pole.
2. Centrifugal force: At equator centrifugal force acts outward i.e opposite to the direction of force of gravity which acts towards the center of the Earth. Thus again, reducing the gravity at equator. However, centrifugal force at the pole is zero.
3. Mass: As Earth has more mass at equator (larger radius of equator compared to pole) , this particular factor increases the gravity at equator.

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