Question

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A satellite is moving with a constant speed 'V’ in a circular orbit about the earth. An object of mass  ‘m’ is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At   the time of its ejection, the kinetic energy of the object is

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Answer 1

Ans - mv²

Explaination—

Centripetal force = Gravitational force

mv²/r = GMm/r²

=> mv² = GMm/r. <--------kinetic energy

Therefore mv² is the kinetic energy.

@BeardoBoy

Answer 2

Ans - mv2

Explaination—

Centripetal force = Gravitational force

mv2/r = GMm/r2

=> mv2 = GMm/r. <

kinetic energy

Therefore mv2 is the kinetic energy.