Orbital speed of a satellite

Orbital speed of a satellite is independent of its mass. Hence satellites of different masses revolving in the orbit of same radius have same orbitational speed. Orbitational speed of a satellite is depends upon the radius of orbit. Greater the radius of orbit, lesser will be the orbital speed.

»» The orbital speed of a satellite revolving near the surface of earth is 7.9 km/sec.

Period of Revolution of a satellite : Time taken by a satellite to complete one revolution in its orbit is called its period of revolution.

i.e. period of revolution of = circumference of orbit / orbital speed

Period of Revolution of a satellite depends upon the height of satellite from the surface of earth. Greater the height, more will be the period of Revolution. Period of Revolution of a satellite is independent of its mass.

»» The period of Revolution of a satellite revolving near the surface of earth is 1 hour 24 minutes.