JEE PHYSICS MCQ: GRAVITATION

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Two planets of radii in the ratio

2:3

are made from the material of density in the ratio

3:2

. Then, the ratio of acceleration due to gravity

\frac{{{g_1}}}{{{g_2}}}

at the surface of the two planets will be

View answer and explanation

Correct option: A

Option A (1) is correct because the ratio of acceleration due to gravity is directly proportional to the product of density and radius, and these factors cancel out in this case.

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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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