What are the factors affecting geostationary satellite orbits?

[songoku]

Homework Statement

Which of the following statements about geostationary satellite is correct?
a. geostationary satellites must orbit from east to west
b. the orbital radius of a geostationary satellite can be varied as long as its period is 24 hours
c. it is a constellation of at least two satellites
d. any geostationary satellites are not able to view the north and south poles
e. the mass of a geostationary satellite does not have to be fixed.

Homework Equations

gravitational force
centripetal force

The Attempt at a Solution

I think the answer is (d). Geostationary satellite is located on equator so it can't view the poles. But I am not sure about (e). From equation gravitational force = centripetal force, the mass of satellite will cancel out so the orbit is independent of the mass of satellite, so maybe (e) is the correct one?

Thanks

 

[Ishraq Begum]

Both (d) and (e) are correct. You can have more than one correct statements.

 

[songoku]

Thanks for your help