Oh, so just find the centripetal force of the first one, find out what it is and equate it to the centripetal force of the satellite with the unknown velocity? I guess I made it a lot harder than I thought, thanks a lot.
The only force would be the gravitational force of the unknown planet. But there's no information about the planet, only that a satellite rotates around it, so I'm assuming there's a formula that I need to derive where a mass needs to cancel?
Homework Statement
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.7x10^4 m/s and the radius is 5.25x10^6 meters. A second satellite also has a circular orbit around the same planet and has an orbit radius of 8.6x10^6 meters. What is the orbital...