Explain why the value of 'g' differs while moving from poles to equator on the surface of the earth. State how would its value change on moving:
(a) towards the centre of the earth.
(b) away from the earth.
Earth is not perfectly spherical. Radius of earth increases from the poles to the equator.
g becomes greater at the poles than that at the equator.
In both the cases (a) and (b), the value of g decreases as the distance from the surface increases.
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