JEE PHYSICS MCQ: GRAVITATION

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Three particles each of mass

m

are kept at the vertices of an equilateral triangle of side

L

. The gravitational field at, centre due to these particles is

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Correct option: A

Zero

Option A (Zero) is correct because the gravitational fields due to the three particles at the center of the equilateral triangle cancel each other out due to symmetry.

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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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