a satellite of mass 200 kg is launched from a site on earth's equator into an orbit 200 km above the surface of earth. a) assuming a circular orbit , what is the orbital period of this satellite? b)what is the satellite's speed in it's orbit? c) what is the minimum energy necessary to place the satellite in orbit , assuming no air friction?
-γMm/(R+r) become GmR²/(R+r)
The Attempt at a Solution
I did both parts a and b just 100% stuck on part c..no idea at all what to do :(
...This makes me frustrated...really!!!