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A satellite S is moving in an elliptical...

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

A

the acceleration of `S` is always directed towards the centre of the earth

B

the angular momentum of `S` about the centre of the earth change in direction, but its magnitude remains constant

C

the total mechanical energy of `S` varies periodically with time

D

the linear momentum of `S` remains constanta in magnitude

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A
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