As the sample moves under the tip at velocity v, friction forces (F) between the tip and the sample cause the cantilever to twist. The amount of twisting, measured by the displacement (x) of the tip ...

As the magnitude of P is increased slowly, two things happen simultaneously: QUESTION: Which happens first, tipping or slipping? The answer to that question depends on the height at which the force P ...

Examples from nature and technology illustrate various orders of magnitude of frictional systems from about 10 centimeters down to one nanometer. (© Michael Berger, Nanowerk) We talk about adhesion ...

Vector quantities have both a magnitude and a direction ... The normal reaction force always acts at right angles to the surface. Friction can sometimes be useful and sometimes it can be a ...

The shear stress is not related to the magnitude of the shear angle ... a body due to the viscous resistance of the surrounding fluid is called the drag force and it acts in the direction opposite to ...

The force is due to friction between the air and the exposed surfaces of the rider and bicycle ... By understanding some basic aerodynamic principles, it becomes possible to identify these components, ...