Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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extrinſeco ad aliam lineam determinato, & cum ipſo acquiſito, quando mu
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tat lineam perpendicularem deorſum, de quo infrà; ſi hunc igitur excipias,
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omnes aly pugnant tantùm ratione diuerſæ lineæ, ſeu determinationis, in eodem
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mobili:
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Vnde ille idem, qui modo pugnat probè conueniet, ſi ad ean
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dem lineam determinetur. </
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Scholium.
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<
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id
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">Obſeruabis primò, præclarum naturæ inſtitutum, quo fit, vt impe
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tus perennis non ſit; vnde certè infinita propemodum emergerent ab
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ſurda, & incommoda. </
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<
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id
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">Secundò, faciliorem modum deſtructionis impetus inſtitui non po
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tuiſſe, immò nec excogitari poſſe; quàm enim facilè, vel impetus op
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poſitus in mobili producitur, vel corpus durum opponitur &c. </
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<
s
id
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">Tertiò, præcipuam rationem huius deſtructionis ducendam eſſe ex
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Ax.6. in quo dicimus nihil eſſe fruſtrà, cumque ordinem à natura eſſe
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inſtitutum, vt potiùs aliquid deſtruatur, & deſinat eſſe, quàm fruſtrà ſit,
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& dicimus deſtrui ad exigentiam totius naturæ. </
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<
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<
s
id
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">Quartò, cum impetus ſuo fine caret, fruſtrà eſt; </
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<
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N157EB
">finis impetus eſt mo
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tus, vt ſæpè diximus, ſic cum globus impactus in alium æqualem ſtatim
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ab ictu ſiſtit immobilis; </
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>
<
s
id
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N157F3
">certe ne fruſtrà ſit impetus, deſtruitur per Ax.6.
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& per Ax. 14. num.2. cum verò determinatio altera maior eſt, certè præ
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ualet tantùm pro rata; </
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<
s
id
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N157FB
">igitur minor eſt motus; </
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>
<
s
id
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N157FF
">igitur, ne aliqui gradus
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impetus ſint fruſtrà, deſtruuntur, cum verò ſunt duo impetus in eodem
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mobili, vt in naui mobili ad lineas oppoſitas determinati; </
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>
<
s
id
="
N15807
">haud dubiè
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maior impetus præualet pro rata per Ax. 15. Igitur non modò totus
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impetus minor perit, ne ſit fruſtrà; </
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>
<
s
id
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N1580F
">ſed etiam aliquot gradus maioris, ne
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ſint etiam fruſtrà; nec enim in communem lineam coïre poſſunt. </
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<
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<
s
id
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">Denique quando ſunt duo impetus ad lineas diuerſas determinati,
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ſed non oppoſitas ex diametro, pugnant pro diuerſo oppoſitionis gradu,
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vt ſuprà fusè dictum eſt. </
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>
<
s
id
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N1581E
">Igitur cum totus impetus non habeat totum
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motum, quod duplex illa determinatio impedit, ne aliqui gradus
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ſint fruſtrà, deſtruuntur; </
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<
s
id
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N15826
">igitur vides impetum impreſſum ab ex
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trinſeco deſtrui tantùm ne ſit fruſtrà; faceret enim vt eſſet fruſtrà vel
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nouus impetus, vel determinato noua, & in hoc ſenſu dicitur impetus
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deſtrui ab impetu. </
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<
s
id
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">Quintò, ſi deſtrueretur mobile, etiam deſtrueretur impetus per idem
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Ax. 6. quia eſſet fruſtrà ſeparatum; </
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<
s
id
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N15838
">immò ex hoc vno principio demon
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ſtramus accidentia & formas ſubſtantiales materiales non poſſe natura
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liter conſeruari extra ſuum ſubiectum, quia ſcilicet eſſent fruſtrà; quip
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pe finem ſuum habent in ſubiecto. </
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>
</
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<
p
id
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N15842
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type
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<
s
id
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N15844
">Sextò, Impetus naturalis innatus nunquam deſtruitur; </
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<
s
id
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N15848
">quia nunquam
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eſt fruſtrà; quippe ſemper habet alterum ſuorum effectuum formalium,
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id eſt vel motum deorſum, vel grauitationem, adde quod fruſtrà de
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ſtrueretur, cum ſit ſemper applicata potentia, id eſt ipſa grauitas, ſed de
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his infrâ fusè. </
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