Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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impedit, ſed vna promouet, adiuuat, & auget cona
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tum, vim, & impetum alterius; & hoc accidit
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applicantur ambæ eidem termino A libræ, ſed ter
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minis oppoſitis A, & B, qui iuxtà libræ, & rotæ pro
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prietatem, & naturam debent moueri motibus con
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trarijs, ſcilicèt A per arcum AI, & B per arcum BH.
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igitur impulſus ponderis D deorsùm, & tractio facta
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àvi F ſursùm conueniunt, & ſe mutuò adiuuant, &
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augent, vt ab vtriſque reuolutio libræ efficiatur, quæ
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ad eaſdem partes impellitur ab eiſdem viribus con
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trarijs. </
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trariæ in libra ſe mutuò non
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, ſed potiùs mu
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tuo ſe adiuuent, ita vt ex vtriſque reſultet vna vis
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, à qua libra reuoluitur. </
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Cap. 4. poſi
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tiuam leui
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tatem noņ
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dari.</
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Prop. 45.</
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PROP. L.
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Si oppoſitos libræ terminos quatuor potentiæ trahant, duæ
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ſursùm, & duæ deorsùm, conatus ſeù vis libram fle
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ctens menſuratur à ſumma differentiæ aſcen
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dentium, cum differentia deſcendentium
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potentiarum.
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<
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">SI tandem eadem libra à quatuor viribus impel
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latur trahaturque, quarum duæ D, & G graues
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ſint deorsùmque tendant, duæ verò M, & F ſursùm̨
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eoſdem terminos libræ trahant, ſitque energia virtu
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tis M maior quàm F, pondus verò D minus ſit quàm </
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