Understanding formula F=GmM/r^2 confusion help

[aruji73]

Homework Statement

Scientists want to place a 2900.0 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.6 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem:



mmars = 6.4191 x 10^23 kg
rmars = 3.397 x 10^6 m
G = 6.67428 x 10^-11 N-m2/kg2

1) What is the force of attraction between Mars and the satellite?

Homework Equations

F=GmM/r^2

The Attempt at a Solution

((6.67428e-11)*(6.491e+23)*(2900))/(1.6*3.397e+6)^2

 

[tms]

Where is the satellite's height measured from?

 

[Dick]

I think this is a copy of https://www.physicsforums.com/showthread.php?t=667935