Asatellite s is moving in an elliptical orbit around the earth . the mass of satellite is very small compared to mass of earth.
a) accelaration of s is always directed towards the centre
b)angular momentum of s about centre of earth changes direction, but not magnitude
c)total mechanical energy changes
d)linear momentum of s remains constant in magnitude

The best and most correct answer among the choices provided by your question is the second choice or letter B.

A satellite (s) is moving in an elliptical orbit around the earth has its angular momentum towards the earth changing in direction, but not in magnitude.

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Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.