| Pilots of high-performance fighter planes can be subjected I to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an accumula- tion of blood in the abdomen and legs. As a result, the brain becomes starved for blood, and the pilot can lose consciousness (“black out"). The pilots wear “anti-G suits" to help keep the blood from draining out of the brain. To appreciate the forces that a fighter pilot must endure, consider the magnitude Fy of the normal force that the pilot's seat ex- erts on him at the bottom of a dive. The magnitude of the pilot's weight is W. The plane is traveling at 230 m/s on a vertical circle of radius 690 m. Determine the ratio Fx/W. For comparison, note that blackout can occur for values of Fx/W as small as 2 if the pilot is not wearing 42. an anti-G suit.

| Pilots of high-performance fighter planes can be subjected I to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an accumula- tion of blood in the abdomen and legs. As a result, the brain becomes starved for blood, and the pilot can lose consciousness (“black out"). The pilots wear “anti-G suits" to help keep the blood from draining out of the brain. To appreciate the forces that a fighter pilot must endure, consider the magnitude Fy of the normal force that the pilot's seat ex- erts on him at the bottom of a dive. The magnitude of the pilot's weight is W. The plane is traveling at 230 m/s on a vertical circle of radius 690 m. Determine the ratio Fx/W. For comparison, note that blackout can occur for values of Fx/W as small as 2 if the pilot is not wearing 42. an anti-G suit.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter6: Applications Of Newton's Laws

Section: Chapter Questions

Problem 72P: Modem roller coasters have vertical loops like the one shown here. The radius of curvature is...

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