Mechanics and heat; a text book for collleges and technical schools (1916)
Franklin, William S. (William Suddards), 1863-1930, Macnutt, Barry, 1878-1936, [from old catalog] joint author · New York, The Macmillan company; London, Macmillan & co., ltd. · leaf 107
the pointQ, and its velocity will be v2, which is represented by the line OQ.The change of velocity Av is evidently parallel to PO (or toQO, for it must be remembered that the time interval At is in-finitely small), and, since the triangles OPQ and 0 PQ aresimilar, we have ♦This matter is discussed… … or Fig. 33- traversed by the particle during the time interval At. Fromequation (i) we have Av v2At ~ 7 (ii) but, the change of velocity Av divided by the time interval Atduring which the change takes place is the acceleration, so that,writing a for Av/At, equation (ii) becomes The direction of a…
Mechanics · Heat
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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-311-203.webp)
