Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 41
um. To determinethe laws experimentally, the apparatus of Fig.28 is used. It consists of several pendulumsattached to a frame. One of them is moved alittle distance and allowed to oscillate Gravitycarries the pendulum to the lowest point, C,Fig. 29. Inertia, or theacquired velocity, car-ries it in… … Fig. 29. Law I. While the arcs remain small, the time of oscilla-tion remains constant. 111. Trying pendulums of the same length but of differentmaterials, e. g. wood and lead, Fig. 28, they vibrate together.Hence Law II. The time of oscillation is independent of thesubstance used for the weight.…
Physics
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