A satellite is revolving in a circular orbit... | Gravitation | JEE Main 2019

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JEE MAIN 2019

11-01-2019 S1

Question

A satellite is revolving in a circular orbit at a height h from the earth surface, such that h << R where R is the radius of the earth. Assuming that the effect of earth’s atmosphere can be neglected the minimum increase in the speed required so that the satellite could escape from the gravitational field of eath is

Select the correct option:

A

$\sqrt{2 g R}$

B

$\sqrt{\mathrm{gR}}(\sqrt{2}-1)$

C

$\sqrt{g R}$

D

$\sqrt{\frac{g R}{2}}$

✓ Correct! Well done.

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