I am stuck on these problems i really dont know how to do them.So can any one please help me. Can you explain how to do these questions. A 620 kg satellite above the earth's surface experiences a gravitational field strength of 4.5 N/kg. a) Knowing the gravitational field strength at earth's surface abd earths radius, how far above the Earth's surface is the satellite? (Use ratio and proportion. b) Determine the magnitude of the gravitational force on the satellite. I know for b) i need a) but i dont seem to get the right answer for a. for a this is wat i do. gs=GMs/Rs^2 ge=GMe/Re^2 then i get g s/g e = Ms/Me x (Re/Rs)^2 But i dont get the right answer for it.