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Advantages of Friction

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-113

2025-11-08

274

While all possible means are taken to reduce the friction between the parts of a machine that move over each other, friction has many advantages. The difficulty of walking on an icy pavement illustrates the decrease of stability that comes with a decrease of friction. The stability of the ceiling of a room is dependent upon the friction between the lath nails and the joists. Horses that easily draw a heavy load over a dry pavement will fall when the pavement is wet. The ability of a locomotive engine to haul its train is due to the friction between the driving wheels and the rails. If the rails are wet, the wheels slip until sand is sifted over the rails.