Quote: degrees of speed acquired by the same moveable over different inclinations are the same when the heights are the same; e.g., a pendulum swings to the same height even if a nail interrupts its swing

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This definition [of uniform acceleration] established, the Author requires and … [Galileo] [POSTULATE] I assume that the degrees of speed acquired by … are equal. [footnote: Galileo added an attempted demonstration of this postulate in later editions] … [p. 205] [Salviati] "I wish to increase the probability … Imagine this page to be a vertical wall, … hangs vertically, suspended by a fine thread two … [The swinging ball will arrive at the same level even if a nail interrupts its swing.]   Google-1   Google-2

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Topic: Newtonian physics (73 items)