Adjective
Relating to friction; moved by friction; produced by friction; as, frictional electricity.
Source: Webster's dictionaryfrictional electricity Source: Internet
frictional heat Source: Internet
frictional gearing Source: Internet
2. As increases, the work done on the blades reduces, but at the same time surface area of the blade reduces, therefore there are less frictional losses. Source: Internet
Accepting the claim of the preface to the Experimenta Nova that the entire work had been essentially completed before March 1663, von Guericke can be fairly credited with inventing a primitive form of frictional electrical machine before 1663. Source: Internet
As long as the disc rotates the brake pads act to decelerate the vehicle via the kinetic frictional forces which create a constant braking torque on the disk. Source: Internet