A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 151
ied tothe back edges FG andEH. These forces beingall equal, the block issubjected to two equalopposing couples inparallel planes. The resultant R, ofthe forces PjPj will adperpendicularly to thebottom face and willbisect the diagonal DG;similarly, the resultanlR2 of P2P2 will bisect the diagonal BE… … FIG. 150.—Equal opposing couples in parallel planes arcin equilibrium. COUPLES 127 The effect of a couple is unaltered by shifting it to another position inthe same plane or in a parallel plane.—A couple may be balanced bythe application in the same plane, or in a parallel plane, of asecond couple…
Physics
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