Q. A satellite is orbiting round the earth's surface in an orbit as close as possible to the surface of the earth.

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A

The time period of revolution of satellite is independent of its mass and is maximum.

B

The orbital speed of satellite is maximum.

C

The Kinetic energy of the satellite is minimum.

D

The total energy of the "earth plus satellite" system is maximum.

Solution:

As the orbital speed of a satellite in a circular orbit around earth varies inversely proportional to the square root of the orbit radius, in this case as the orbit radius is minimum options (A), (B) and (C) are correct.

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