Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 215
ffect ofthe centrifugal force. at earthsurface Fig. 122. § 171.—We know that the earth revolves about itsaxis A A once in twenty-four hours, and that the cir-centrifngai force eumferences of the parallelsof latitude, that is to say,the circles perpendicular tothe axis, have velocities whichdiminish… … that of a bodywhose weight is P; P 9 in which Fx is the angular velocity of the earth. Sub- P stituting M for —, we have F = MV?R. Denoting the equatorial radius CE = CP, by R, andthe angle CPC — PCE, which is the latitude of theplace, by <p, we have in the triangle PGG\ R = Rcos MECHANICS OF…
Mechanics · Acoustics · Optics
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-62-38.webp)
