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
(1) The acceleration of S is always directed towards the centre of the earth
(2) The angular momentum of S about the centre of the earth changes in direction,but its magnitude remains constant
(3) The total mechanical energy of S varies periodically with time
(4) The linear momentum of S remains constant in magnitude