Martin, Louis Adolphe, 1880- · New York, J.Wiley & Sons, Inc.: [etc. etc.] · leaf 190
Fig. 120 RESISTANCE TO ROLLING 173 friction on this turning pair is taken into account bythe friction circle. The line of action of the two forceswhich alone act upon the wheel must pass thru 0 andbe tangent to the friction circle of the turning pair. Todetermine upon which side of the friction… … i<-tt-»i Fig. 121 ward force must be tangent to the friction, circle at itsleft side. The hne of action of R is thus determined. Let us now find the horizontal force required to keepa wagon, having four wheels of equal size, moving withconstant velocity. If we assume the radii of the…
Mechanics
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