JEE PHYSICS MCQ: GRAVITATION

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If a planet of given density were made larger (keeping its density unchanged) its force of attraction for an object on its surface would increase because of increased mass of the planet but would decrease because of larger separation between the centre of the planet and its surface. Which effect would dominate?

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Correct option: B

Increase in radius

The correct answer is B (Increase in radius) because the acceleration due to gravity is directly proportional to the radius of the planet when density is constant.

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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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v_e

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\theta

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