This 19th-century physical law recognizes that in a system that uses energy, such as a steam or gasoline engine, some energy is lost forever as frictional processes turn it into heat.
The rove is drawn forward by surface or frictional contact between the roll itself and a rapidly rotating drum.
In many treatises on hydraulics it is stated that the frictional resistance is independent of the nature of the solid surface.
The frictional resistance is independent of the pressure between the fluid and the solid against which it flows.
The distance through which the frictional resistance is overcome is v ft. per second.
The frictional resistance of large surfaces is proportional to the area of the surface.