Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
s
id
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">Obſeruabis autem nouum quoddam genús reſiſtentiæ; </
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<
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id
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N12B05
">nam ſingulæ
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partes rupis ab applicata potentiâ aptæ ſunt loco moueri per impreſ
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ſum impetum, & maior potentia ſimul omnes loco moueret; </
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<
s
id
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N12B0D
">at verò
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omnes ſimul, & coniunctim conſideratæ; </
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<
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id
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N12B13
">quatenus ſcilicet vna pars
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non poteſt moueri ſine alia, & comparatæ cum illa potentia debili di
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cuntur habere prædictam reſiſtentiam, quæ ſuperat potentiæ vires; </
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<
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quòd ſcilicet à maiori moueri tantùm poſſint; quia plures partes im
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petus poſtulantur, quam ſint eæ, quæ à prædictâ potentiâ poſſunt pro
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duci. </
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Theorema
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33.
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Vel producitur impetus in omnibus ſubiecti partibus vnitis, vel in nulla; </
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modò nulla fiat ſeparatio, neque compreſſio
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: Certum eſt enim in ijs omni
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bus partibus, quæ auolant ab ictu, produci impetum. </
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<
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id
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N12B44
">Probatur igitur
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1. quia ſi non producatur in omnibus partibus, & nulla ſeparetur ab
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alijs; </
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<
s
id
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N12B4C
">certè nulla mouetur, vt certum eſt; </
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<
s
id
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N12B50
">igitur nulla habet impetum; </
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<
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N12B54
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quia ibi non eſt cauſa formalis, vbi non eſt effectus formalis; alioquin
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eſſet fruſtrà, contra Ax. 6.2. </
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<
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N12B5B
">Tu dicis produci impetum in aliquot parti
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bus; hoc dicis, hoc proba? </
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<
s
id
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N12B61
">an potes dignoſcere impetum niſi ex motu? </
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<
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vel conſeruaretur hîc impetus ſequentibus inſtantibus, vel ſtatim ſecun
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do inſtanti deſtrueretur. </
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<
s
id
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N12B6A
">Primum dicere abſurdum eſt; </
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>
<
s
id
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N12B6D
">quia ſi hoc eſſet
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multisictibus repetitis tandem moueretur totum mobile; ſi verò de
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ſtrui dicatur. </
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>
<
s
id
="
N12B75
">Secundo inſtanti; eadem ratio probat non produci. </
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<
s
id
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N12B78
">Pri
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mo inſtanti, quæ probat deſtrui. </
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<
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id
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">Secundo nam ideo deſtruitur. </
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<
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id
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">Secun
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do quia eſt fruſtrà, ſed non minus eſt fruſtrà. </
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<
s
id
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N12B85
">Primo igitur non produ
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citur. </
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<
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id
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">Primo 4. probatur; </
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<
s
id
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">quia cum non ſufficiant partes impetus, quas
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dixi produci, vt omnibus partibus ſubiecti diſtribuantur; </
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<
s
id
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">certè non eſt
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vlla ratio, cur potiùs his quàm illis diſtribui dicantur; cum vna ſit tan
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tùm immediatè applicata. </
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>
<
s
id
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N12B9B
">Igitur certum eſt vel produci in omnibus, vel
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in nulla, niſi forte aliquæ auolent, ſed tunc ſeparantur. </
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<
s
id
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N12BA2
">Obiiciet aliquis 1. eſſe cauſam neceſſariam applicatam ſubiecto ap
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to: </
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<
s
id
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N12BA8
">igitur agit per Ax. 12. Reſpondeo eſſe impeditam; </
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>
<
s
id
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N12BAC
">nam reſiſtentia
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ſubiecti ſuperat vires potentiæ vt dictum eſt; </
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<
s
id
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N12BB2
">immò in ipſo motu re
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torqueo argumentum; licèt enim ſit applicata cauſa neceſſaria mouens,
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non tamen mouet. </
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<
s
id
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">Obiiciet 2. Ignis applicatus agit in nonnullas partes ſubiecti, licèt
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non agat in omnes; igitur & potentia motrix. </
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<
s
id
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N12BC2
">Reſpondeo non eſſe pa
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ritatem; </
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>
<
s
id
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N12BC8
">quia vna pars poteſt calefieri, & reſolui ſine alia, vt conſtat
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non tamen vna moueri ſine alia, cui coniuncta eſt, niſi ſeparetur; igi
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tur nec recipere impetum ſine alia. </
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>
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<
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">Obiiciet. </
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<
s
id
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">3. ſint duo trahentes idem mobile; </
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>
<
s
id
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N12BD9
">ita vt ſeorſim neuter
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trahere poſſit, coniunctim verò vterque poſſit; </
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>
<
s
id
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N12BDF
">certè ſi alter non pro
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ducit impetum ſeorſim, nec etiam coniunctim producet; </
s
>
<
s
id
="
N12BE5
">nec enim au
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gentur eius vires ab altero: </
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>
<
s
id
="
N12BEB
">Reſpondeo vtrunque agere actione com
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muni; igitur non eſt mirum ſi effectus maior eſt, quem tamen neuter </
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