## Essential University Physics: Volume 1 (3rd Edition)

We find the speed of the plane: $v=(340)(1.8)=612m/s$ We know that the centripetal acceleration cannot exceed 5g's, for we must subtract one from 6g's since gravity is acting downward. Thus: $5g =\frac{612^2}{r} \\ \fbox{ r = 7600 meters}$