# Energy of an Orbiting Satellite

Physics

## example

### Orbital Speed of satellites

Example: The orbital speed for an Earth satellite near the surface of the Earth
is 7 km/sec. If the radius of the orbit is 4 times the radius of the Earth, what would be the orbital speed?

Solution: Orbital speed is for a satellite at a distance from the Earth's centre.
Firstly, the satellite is said to be near the earth's surface, we take the radius as Earth's radius, ''.

Now, the radius of the orbit is 4 times the radius of the earth, the orbital speed is given by,
km/s

## example

### Energy of satellites

Example: The energy required to remove an Earth's satellite of mass  from its orbit of radius to infinity?

Solution: For a satellite under motion,

The energy required to remove an Earth's satellite of mass from its
orbit of radius to infinity is called as Binding Energy,
AS  .