Posted by jess on .
A satellite is in circular orbit above the Earth at an altitude of 2000 km. What is the orbital speed of the satellite? what is the equation i need to use

physics 
drwls,
GM/(Re +h)^2 = V^2/(Re + h)
or
G M = V^2*(Re + h)
Solve for V
G = universal constant of gravity
Re = Earth radius = 6370 km
h = 2000 km
M = Earth's mass 
physics 
jess,
I did that and I am still getting the wrong answers, do I have to convert anything?

physics 
drwls,
Re and h should be in meters if G is in N*m^2/kg^2
M must be in kg. Are you sure you used the correct values for G and M?
You will get the answer in m/s if you do it right.