Question

Earth is flattened at the poles and bulging at the equator. This is because:

• A. the Earth revolves round the sun in an elliptical orbit
• B. the angular velocity of spinning about its axis is more at the equator
• C. the centrifugal force is more at the equator than at poles
• D. none of these

Answer 1

The correct option is C the centrifugal force is more at the equator than at poles

Centrifugal force is more at the equator than the pole, because radius at the equator is more than that of poles.
$F=m{\omega }^{2}R$
$F\propto R.$
$\therefore F$ at equator is more than that of F at poles.