Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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497
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ſed poſt certum tempus, puta AG, à continuata fluidi
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reſiſtentia ſenſim retardante tandem extinguatur,
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ſubſequens verò gradus impetus acquiſitus eF
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eadẽ
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ratione extinguetur tempore BK æquali priori AG:
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in hiſce verò æqualibus temporibus acquirit mobile
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æquales gradus velocitatum, & ab his ſubtrahi de
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bent priores illi gradus velocitatum BC, & eF inter
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ſe æquales iam extincti, vt dictum eſt, ergo reſidui
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gradus velocitatum Gi, & mM æquales
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erũt
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inter ſe:
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& ſic ſemper contingit in ſubſequenti tempore;
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do</
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verò perſeueratidem gradus impetus in mobile,
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tunc motus eius æquabilis eſſe debet, ſcilicèt tem
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poribus æqualibus percurret ſpatia æqualia, igitur
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impetus in mobile in progreſſu ſolius
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tẽ-poris
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poris</
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AG augeri poteſt, licèt non vniformi
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to</
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, & poſt tempus AG impetus non amplius creſcit,
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& graue motu æquabili fertur, quod erat &c. </
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Cap. 11. gra
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uia in fluido
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velocitati
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bus inæqua
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libus ferri
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debere.</
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PROP. CCXLV.
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Si duo corpora æqualia, & inæqualitèr grauia per fluidum
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deſcendant prius ad æquabilitatem reducetur leuius cor
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pus, quàm grauius.
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<
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">SInt duæ moles inter ſe æquales, & inæqualiter
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graues, eiuſdemque figuræ, ſphæricæ nempè, A
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grauior quam B, hæ verò ex ſui natura, ſcilicèt in va
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cuo vna, & eadem velocitate ferri debent, quæ ſit V;
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ſed duo corpora A, & B inæquali energia medium̨
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fluidum RSTX percutiunt, impelluntque ſecundùm
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proportionem quam habet vis percuſſiua compoſita
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ex vi impetus V, & ex maiori materia, ſeu maſſa cor-</
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