A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 237
Fig. 149. … The wheel of a vehicle is useful in reducing frictionalresistance, as explained-in Art. 86; in overcoming ob-stacles in the road it acts as a continuous lever, hencethe advantage of a large wheel. 208.] WHEEL AND AXLE. 219
Mechanics
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