Question

Earth is flattened at the poles, bulged at the equator, because

• A. centripetal force is more at equator then at poles.
• B. centripetal force is less at equator then at poles.
• C. centrifugal force is more equator than at poles.
• D. centrifugal force is less at equator than at poles.

Answer 1

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

Earth rotates about its own axis hence it has centrifugal force acting on it.

Centrifugal force is greater at equator because of large radius. During formation of earth when it was in molten state, mass from poles came towards equator creating bulge at equator and flat at poles.

$F=\frac{m{v}^2}{r}$

Where , $F=$cenrtifugal force ,$m=$mass ,$r=$radius , $v=$velocity.

This same phenomenon can be seen bye spinning a bowl of water.