Question

The bulging of Earth at the equator and flattening at the poles is due to
A). Centripetal Force
B). Centrifugal Force
C). Gravitational Force
D). Electrostatic Force

Answer 1

Hint: The bulging of the equator and flattening at the poles is due to the Earth rotation. The Earth rotation formed a pseudo effect. The pseudo effects push the earth in the outward direction, bulging from the Earth and the poles flattening

Complete step by step solution:
The bulging of the equator and flattening at the poles is due to the rotation of the Earth. The Earth rotation creates the centrifugal force which is the pseudo effect counter. It balances the centripetal force that acted in inward direction.
The term centrifugal force, it is that force which is perpendicular to the axis of the Earth on excluding the equator. It’s not opposite to gravity but it gives a vector component towards the equator.
The term pseudo force is that force which acts to the overall mass whose motion is described by the non-inertial frame. The pseudo force is also known as the inertial force. It satisfied Newton's law of motion.
The pseudo effect pushes the earth outwards, bulging form the Earth and flattening at the poles.
So, the option (B) is correct.

Note: The equatorial bulge in Earth’s because of the tidal force. Because of the tidal force the torque is there. The equatorial bulge of the Earth is 47.72km because of the Earth rotation.
The effect is caused by the fundamental property of the mass, and inertia. Our planet’s gravity tries to pull it back towards the center.