In this problem I need to figure out how far I am from the airport. The pilot tells us that we have to circle the aiport before we can land. We will maintain a speed of 450mph at an altitude of 20,000ft. while traveling in a horizontal circle around the airport. I notice that the pilot banks the plane so that the wings are oriented at 10deg to the horizontal. An article in the in-flight magazine says that planes can fly because the air exerts a force "lift" on the wings which is perpendicular to the wing surface. So: V=660 ft/s h=20,000 ft bank = 10deg to the horizontal So I drew a FBD with my normal force perpendicular to my wings, which were banked to the horizontal. Sum Fx=Wx=ma where a=v^2/r sin10 (mg)=mv^2/r (mass drops out) sin10 (32.2ft/s^2)=(660ft/s)/r solving for r=118.03ft add that to the current altitude of 20,000ft gives a distance of 20,118ft from the airport? It doesn't seem like this problem could be this "easy". I feel like I am totally missing a point here. Thanks!