JEE PHYSICS MCQ: GRAVITATION

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Statement-1: If earth suddenly stops rotating about its axis then the acceleration due to gravity will become same at all the places.
Statement-2: The value of acceleration due to gravity except at poles is independent of rotation of earth

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Correct option: B

Statement-1 is true, Statement-2 is false

Option B (Statement-1 is true, Statement-2 is false) is correct because the acceleration due to gravity becomes the same everywhere if the Earth stops rotating, and the value of g depends on the rotation of Earth.

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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