AP Physics B Question, please Help.?

Question

A satellite has a mass of 5900 kg and is in a circular orbit 5.0 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.00 106 m. What is the true weight of the satellite when it is at rest on the planet's surface?

Answer 1

1) the frorce between two bodies F= Mmg/r^2
2) An orbiting satilite the centripetal force is mw^2/r =Mm/r^2
solve 2 to get M then use 1 to get force