# Orbital Velocity

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

### Relative motion of geostationary satellite with respect to earth

Example: What is the relative velocity of geostationary satellite with respect to the spinning motion of the Earth?

Solution: Geostationary satellites remain at the same position with respect to the Earth, so that they scan the same place in a better way. Therefore, the relative velocity of geostationary satellite with respect to the spinning motion of the Earth is .