A satellite is moving in a circular orbit around the earth with kinetic energy K. Due to collision with dust particles, it slowly loses 50% of its energy and finally starts rotating in a circular orbit of smaller radius. Then the kinetic energy of the satellite in this new orbit is

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5K2

3K2

answer is D.

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Detailed Solution

Initial total energy = -KFinal total energy =(−K)−K2=−3K2∴ Final kinetic energy =+3K2

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