JEE PHYSICS MCQ: GRAVITATION

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Satellite A and B are revolving around the orbit of earth. The mass of A is 10 times of mass of B.The ratio of time period

\left( {\frac{{{T_A}}}{{{T_B}}}} \right)

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Correct option: B

Option B (1) is correct because the time period of a satellite depends only on the radius of the orbit and the mass of the central body (Earth), not on the mass of the satellite itself.

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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