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JEE PHYSICS MCQ: GRAVITATION

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Two identical solid copper spheres of radius R are placed in contact with each other. The gravitational attraction between them is proportional to

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Correct option: C

{R^4}

Option C (

{R^4}

) is correct because the gravitational force is proportional to the product of masses divided by the square of the distance between them.

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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}

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v_e

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\theta

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