The classical problem of rebound is usually treated by assuming that the colliding bodies are rigid and that the coefficient of friction, ~ , is constant. Two contact states can be distinguished: slidinq, in which the ratio of friction force to normal force is equal to ~ , and rolling, in which the friction force is zero. If sliding gives way to rolling during impact, the friction force will fa...

Pressure systems are widely used in almost all areas of the public economy related to liquids. For example, at present, supply drinking water populated world, heating systems, agriculture, cleaning basins from muddy flows, mining industry, construction, raising chemical process moving flows same speed, pipeline viscous efficient being for transportation and many other purposes. Recently, plasti...

It is a research which could enter into contradiction with the current trend concerning the hip implants. It is known as sliding friction, which is characteristic of present artificial hip joints, is higher than in the case of rolling friction. The paper reports the studies of the functioning mode of a novel spherical bearing MoM (metal on metal) with rolling friction, with potential applicatio...