What is the value of theta for a satellite not falling back to the Earth if it is launched from the direction tangent to the surface of the Earth? I have found the escape velocity which is 11.18km/s, and initial speed for the satellite which ensure it doesn't fall back to Earth, which is 7.4km/s. Shall I solve the questions using conservation of angular momentum? Or centrifugal force? It is an elliptical orbit.