you are a fighter pilot in your jet. you are moving at 1000 km/h when you go into a climb in order to avoid a HUGE UFO. Your climbing path is a circular arc and you continue to move at 1000 km/h. At the position shown you find that you feel just barely weightless-that is, your behind just quits pressing down against the seat and you momentarily fell weightless. Whats the radius of the circular arc?