physics
posted by kaitlyn on .
A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (b) Determine the period of the satellite's orbit.
the satilites altitude above the surface of earth is 6076312.71m.
im using the equation P=2*pi*r/v and am coming up with 1.87 and its not right. i really need help!

You need to add the earth's radius (6378*10^3 m) to the altitude of the orbit (6076*10^3 m) to get the radius r of the orbit