JEE PHYSICS MCQ: GRAVITATION

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Assertion: Angular momentum of a satellite remains conserved.
Reason: Conservation of linear momentum leads to conservation of angular momentum.

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Correct option: C

If Assertion is True but the Reason is False

Option C is correct. Angular momentum of a satellite is conserved because there is no external torque acting on it, but conservation of linear momentum does not directly lead to conservation of angular momentum.

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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