Posted by jess on Friday, March 9, 2012 at 12:07am.
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
I did that and I am still getting the wrong answers, do I have to convert anything?
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.
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