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A satellite is revolving around the earth with a kinetic energy E. If the satellite is revolving near the surface of the earth, then the minimum additional kinetic energy needed to make it escape from its orbit is

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$\frac{E}{2}$

$\sqrt{E}$

answer is D.

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Detailed Solution

Kinetic energy in the orbit = E

so, total energy in the orbit = - E

minimum total energy at infinity = 0

so, energy required to escape from the orbit = E

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