Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 123
hrough the fulcrum. Now it can easily be proved, that, unless thetwo forces are in thesame plane, they canhave no single result-ant; and hence followsthe necessity of the firstcondition. In the secondplace, let us suppose. Fig.40, that J. Q and £ Pare the lines of directionof two forces in the… … rig. 40. GENERAL PBOPERTIES OP MATTER. 99 components should be sncli that they would tend to turn thelever in opposite directions. The necessity of the third condition will be most readily seenif studied under two cases. In the first place, let us take thecase where the two forces are parallel, as…
Matter · Heat
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