JEE PHYSICS MCQ: GRAVITATION

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Earth is flattened at poles, bulged at the equator. This is due to:

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Correct option: C

The centrifugal force is more at the equator than
at the poles

Option C (The centrifugal force is more at the equator than at the poles) is correct because the Earth's rotation causes a greater centrifugal force at the equator, leading to the bulging shape.

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The escape velocity for a body projected vertically upwards from the surface of the earth is

11.2\mathrm{\;\;km}{\mathrm{s}^{ - 1}}

. If the body is projected in a direction making an angle of

{45^0}

with the vertical, the escape velocity will be The escape velocity of a body projected from the surface of earth is

v_e

. If the body is projected at an angle

\theta

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Statement II: As observed by another astronaut's in the same satellite, force of gravity and centrifugal force balance each other. An iron ball and a wooden ball of the same radius are released from a height 'h' in vacuum. The time taken by both of them to reach the ground is