Gravitational Force on satellite orbits

[temaire]

Homework Statement

A satellite orbits Earth 4.0 x 10$$^{7}$$ m away. The force of gravity between the satellite and Earth is 228 N. What is the mass of the satellite?

Homework Equations

Fg = (Gm1m2)/(r$$^{2}$$)

The Attempt at a Solution

http://img218.imageshack.us/img218/7876/satellitemk0.jpg​

[/URL]

Is my answer right?

 

[simon1987]

Homework Statement

A satellite orbits Earth 4.0 x 10$$^{7}$$ m away. The force of gravity between the satellite and Earth is 228 N. What is the mass of the satellite?

Homework Equations

Fg = (Gm1m2)/(r$$^{2}$$)

The Attempt at a Solution

http://img218.imageshack.us/img218/7876/satellitemk0.jpg​

[/URL]

Is my answer right?

Looks good.