Elements of mechanics: treated by means of the differential and integral calculus (1887)
Peck, William G[uy], 1820-1892. [from old catalog] · New York, Chicago, A. S. Barnes & company · leaf 108
we draw BH perpendicular to BR, we shall have, T)JT cos BBH = yy^ ; but we have, for the component R, T)TTR = QcosBBH= Q x -^- Substituting for Q its value, and reducing, R _ AG BH P - EG X BB When B is depressed, BIT and BB approach equality,and EG continually diminishes ; that is, the mechanical… … Fig. 68. Tne Balance. aii A Balance is a machine for weighing bodies: itconsists of a lever AB, called thebeam, a knife edge fulcrum F, andtwo scale-pan^ D and F, suspendedby knife-edges from the extremitiesof the lever arms FB and FA.These arms should be symmetrical,and of equal length; the…
Mechanics
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