Natural philosophy. including statics, hydrostatics, pneumatics, dynamics, hydrodynamics, the general theory of undulations, the science of sound, the mechanical theory of music, etc. : designed for the use of normal and grammar schools, and the higher classes in common schools (1867)
Sangster, John Herbert, 1831-1904 · Montreal : Printed and published by John Lovell · leaf 47
the part A. Xow, if Bhave a pitch of ^gigth of an inch and A a pitch of -,i-, then at each revolu-tion of the handle the weight will be raised through .1^ — _^i^- = -i - of aninch, and the whole instrument has the same mechanical effect as a singlescrew having a pitch of Tjsoth of an inch. 130. For… … Art. 131] THE ENDLESS SCREW. 45 Example 101.—What power will exert a pressure of 20000 lbs.by means of a flifFerential screw having a power lever 50 inchesin length, the exterior screw a pitch of y( of aa inch, and theinner screw a pitch of-/,ith of an inch? SOLVTlOy. HprpTr=20000,/ = 50in., and(Z=…
Physics
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