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

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

Solution & Step-by-step Explanation

The only force acting on the satellite is gravity, which is a central force directed towards the center of the earth. Therefore, the acceleration is always directed towards the center of the earth.Note: Angular momentum is conserved in both magnitude and direction; Total mechanical energy is constant.

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A satellite is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then:
A
The acceleration of is always directed towards the centre of the earth
B
The angular momentum of about the centre of the earth changes in direction, but its magnitude remains constant
C
The total mechanical energy of varies periodically with time
D
The linear momentum of remains constant in magnitude

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