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## Homework Statement

If the space station orbits the earth 225 km above the surface , what are the satellites orbital speed and period ? The mass of the earth is 5.97 E24 kg and the radius is 6.38 E6 m.

## Homework Equations

## The Attempt at a Solution

I already have the speed ( v ) , I just don't understand how to find the orbital period

Te^2/ Re^3 = Ts^2/ Rs^3

I know the earths radius and orbital, but do I put the t in hours or seconds ?

How do I find the satellites radius ?

If anyone could help it would be appreciated.