JEE PHYSICS MCQ: GRAVITATION

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Assertion: The time period of revolution of a satellite close to surface of earth is smaller than that revolving far from surface of earth.
Reason: The square of time period of revolution of a satellite is directly proportional to cube of its orbital radius.

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Correct option: A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion

Option A is correct because the time period of a satellite is related to its orbital radius, and satellites closer to Earth have smaller orbital radii and thus shorter periods.

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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