As the bicycle and its rider move along the road, the air exerts a force that increases sharply with speed. The force is due to friction between the air and the exposed surfaces of the rider and ...

Blade force was found to be the only propulsive force to counter the drag forces, consisting of both air drag and hydrodynamic drag, acting on the system. Vertical oscillations of the shell are shown ...

The unmanned X-37B shuttle, owned by the U.S. Air Force, has been in orbit for over a year. Although the tests conducted are ...