JEE PHYSICS MCQ: GRAVITATION

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Kepler’s second law states that the straight line joining the planet to the sun sweeps out equal times. This statement is equivalent to saying that

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Correct option: B

Tangential acceleration is zero

Option B (Tangential acceleration is zero) is correct because Kepler's second law implies conservation of angular momentum, which means the tangential acceleration is zero.

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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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