A hand book of general instruction for mechanics, containing useful rules and memoranda for practical men (1907)
Smith, Franklin Elijah, 1872- · New York, D. Van Nostrand company · leaf 286
eight herewhen the lift begins is supported by 4singles of the rope, and therefore thepower required to balance the weightin this combination will be one fourthof the weight. That is, in this systemthe tension of the weight is equallydistributed among the four parts ofthe cord which sustains the… … Fig. 87 Example. A piece of iron weighing 9 tons is liftedby a pair of blocks of two sheaves each, the rope is fast-ened to the upper block. What power is required tolift it? (Fig. 87.) 274 A HAND BOOK FOR MECHANICS 9 7 = 21 tons. Ans.4 Example. A cylinder cover weighing 1100 pounds islifted by a…
Mechanics · Arithmetic · Measurement
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