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Question

A satellite 'S' is moving in an elliptical orbit around the earth. The mass of the satellite is very small as compared to the mass of the earth. Then

A
the acceleration of 'S' is always directed towards the centre of the earth
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B
the angular momentum of 'S' about the centre of the earth changes in direction, but its magnitude remains constant
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C
the total mechanical energy of 'S' varies periodically with time
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D
the linear momentum of 'S' remains constant in magnitude
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