JEE PHYSICS MCQ: GRAVITATION

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Statement I: The weight of a body at the centre of earth is zero

Statement II: The mass of a body decreases with increase in depth below the surface of earth.

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Correct option: C

If Statement - I is true but Statement - II is false.

Option C (If Statement - I is true but Statement - II is false) is correct because weight at the center of the Earth is zero, but mass remains constant regardless of depth.

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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}}

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{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