Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 62
Fig. 55. 182. First, when the force actsparallel to the plane, Fig. 55, theload W presses upon the plane in consequence of its weight.This acts perpendicular to the earth, and is the force ba.But ab, which is the resistance of the plane and the power,is made up of the components ac, the power, and… … ST:RS, or P:W=ST:RS. That is, the power is to theweight as the height of the plane is to its length. 183. Second. When the force is ap-plied parallel to the base, Fig. 56, apart is expended in increased pressureupon the plane. Hence since the trian-gles are again similar, Ac:cb=ST:TR.Fig. 56. But…
Physics
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