system
Given the following post, respond as if you're commenting on Reddit:
human
How does a geosynchronous satellite stay up?

Technically...it's just hovering above one spot. It doesn't seem to be free falling across the sky. 

Does it require more fuel than a satellite that actually orbits?
gpt
Bear in mind that the earth rotates. A geosynchronous satellite is necessarily falling around the earth, as this is the only means by which it could remain above a relatively fixed point on the ground.

It is just that it has an orbital period that matches a day in duration.