161 ELEMENTS OF MACHINERY. therefore, pr pr F' — L = L — L Ru Rd 7T 2R tt If the screw made one revolution, the force way is = 2R and the load way is = p. BLOCK AND FALL Neglecting the stiffness of the rope, we can easily study the action of the block and fall. We know that each single block must… … COMMON BLOCK AND FALL. In Fig. 18, A is the block and B the fall, and one continuous rope goes over all pulleys. The number of pulleys in the block = the number of pulleys in the fall = n; then 1 F — — L. 2n Since we have n pulleys it is evident that the load hangs on 2n ropes, which have all the…
Brewing · Malt
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