JEE PHYSICS MCQ: GRAVITATION

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Select the incorrect statements from the following.
(i) The orbital velocity of a satellite increases with the radius of the orbit.
(ii) Escape velocity of a particle from the surface of the Earth depends on the speed with which it is fired.
(iii) The time period of a satellite does not depend on the radius of the orbit.
(iv) The orbital velocity is inversely proportional to the square root of the radius of the orbit.

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Correct option: D

(i), (ii), and (iii)

Option D ((i), (ii), and (iii)) is correct because statements (i), (ii), and (iii) are all incorrect regarding satellite motion and escape velocity.

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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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