1. The problem statement, all variables and given/known data A satellite is in orbit just above the surface of a spherical planet which has the same radius as Earth and the same acceleration of free fall at it's surface. Calculate: i) Speed ii) Time for 1 complete orbit. Radius of Earth = 6400km or 6400000m and accel. of free fall = 9.81ms-2 2. Relevant equations Speed (v) = (2pi)r/T Cent. Accel. (a) = v2/r Cent. Force. F = mv2/r = mw2r 3. The attempt at a solution First time on here so finding it difficult to locate symbols so sorry for loss in translation. My attempt of a solution is: v = (2xpi)x 6400000/3.1e7 (no of s in 1 year (365.25days)) v = 1.29ms-1 then plugged this in to v2/r but this is heading down a blind alley. Please Help.