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 249
e one whichis generally employed, though in practice,as remarked in Art. 226, the wheels areplaced side by side in two blocks. If in this arrangement theweight iv of the movable block istaken into account, the relation isthen W+iv = nP. 223. Third System. In the sys-tem of pulleys shown in Fig.… … Fig. 164. 5.J PULLEY. 231 the same upward at e; also, on D it is 8P, and thesame upward at d. That is, the weight is supported bythe four forces; viz., P + 2P + 2aP + 23P = 15P.Hence W = 15P = (24 - 1)P, or, in general, W = (2* - i)P. The tension on the beam is equal to TT + P, or 24P. 224. The…
Mechanics
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