Millikan, Robert Andrews, Gale, Henry Gordon · Boston : Ginn and Co. · leaf 173
ntage of the ball bearing (Fig. 159, (2)) is that thesliding friction in the hub is almost completely replaced by rollingfriction. The manner in which ball bearings are used in a bicycle 146 WORK AND HEAT ENERGY pedal is illustrated in Fig. 160. The free-wheel ratchet ia showu inFig. 161. The pawls… … Fkj. 160. The bicycle pedal Fig. 161. Free-wheel ratchet 175. Fluid friction. When a solid moves through a fluid, as when abullet moves through the air or a ship through the water, the resistanceencountered is not at all independent of velocity, as in the case of solidfriction, but increases for…
Physics
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