Satellite Orbiting around the Earth (gravitational fields)

[HarleyM]

Homework Statement

A 500 kg satellite experiences a gravitational force of 3000N while moving in a circular orbit around the Earth.

Find the radius of the orbit

Homework Equations

F_G=GM₁M₂/r²
g=GM_E/r²

Mass of Earth= 5.98x10²⁴ Kg
Radius of Earth= 6.38x10⁶ m

The Attempt at a Solution

F_net=F_G
3000N=GM_EM_S/r²
r=√[(6.67x10^-11)(5.98x10²⁴)(500)/3000]
r= 8.15x10⁶

DO I subtract the radius of the Earth from my answer for radius of sattellite? OR would that give me the altitude, and they just want radius?

 

[DaveC426913]

Well, they did ask for radius, not altitude.

 

[HarleyM]

Ya I kind of answered my own question as I typed it up here, thanks for the advice