Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
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47
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per Axioma illud Metaph. probari,
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Data quacumque creatura dari potest
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perfectior, vel imperfectior.
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<
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">Tertiò, ſi dato quocunque motu poteſt dari tardior: igitur dato quo
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cunque impetu poteſt dari imperfectior. </
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<
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id
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">Quartò, ſi daretur punctum impetus in intenſione: non poſſet dari
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motus tardior in infinitum ſine diuerſis gradibus perfectionis. </
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<
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">Quintò, ſine hac diuerſa impetus perfectione non poſſet explicari
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productio continua impetus, quæ ſit temporibus inæqualibus, neque de
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ſtructio eiuſdem impetus; nec motus in diuerſis planis inclinatis, vel in
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diuerſis lineis citra perpendicularem, ſed de his omnibus ſuo loco. </
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<
s
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">Sextò, Denique ratio propoſita rem iſtam euincit; </
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<
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">cum enim in motu
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vectis plures partes producantur verſus centrum, ſcilicet, in maiori pon
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dere, quod attollitur; & cum hæ habeant motum tardiorem, ſequitur ne
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ceſſariò eſſe imperfectiores. </
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Theorema
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78.
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<
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Dato quocumque impetu dari poteſt imperfectior, & imperfectior,
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quia da
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to quocumque motu dari poteſt tardior, ergo dato quocumque impetu
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imperfectior. </
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Theorema
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79.
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Non poteſt explicari tarditas motus ſine diuerſa perfectione impetus, per
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pauciores ſcilicet eiuſdem impetus partes.
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</
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<
s
id
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"> Primò, quia cum retardari poſſit
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hic motus, & deſtrui ſucceſſinè hic impetus; </
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<
s
id
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">cumque inſtantia motus
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velocioris ſint breuiora; </
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<
s
id
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">certè initio motus, breuiori ſcilicet tempore
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imperfectior impetus deſtrui tantùm poteſt; </
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>
<
s
id
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">cum enim æqualis æquali
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bus temporibus; certè inæqualis inæqualibus. </
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<
s
id
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">Secundò quia vix explica
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ri poreſt quomodo duæ formæ homogeneæ in eodem ſubiecti puncto
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exiſtere poſſint, quod etiam in commune eſt calori, lumini, &c. </
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Theorema
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80.
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Cum applicatur potentia centro vectis, non producitur æqualis impetus ver
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ſus circumferentiam in omnibus partibus, ſed maior verſus eandem circumfe
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rentiam,
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quia eſt maior motus. </
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Corollarium
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1.
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<
s
id
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">Hinc difficiliùs attollitur pertica CA ex puncto C motu circulari,
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quàm ex puncto B motu recto; </
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<
s
id
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">quia ſcilicet, cum motu recto ex puncto B
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attollitur, omnes partes mouentur motu æquali; </
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>
<
s
id
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">igitur impetus æqualiter
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omnibus diſtribuitur; </
s
>
<
s
id
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N14170
">igitur modò producantur tot partes impetus, quot
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ſunt partes in mobili; </
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<
s
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">haud dubiè attolletur: </
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<
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">at verò, cum motu circulari
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ex puncto C attollitur, omnes partes inæquali motu attolluntur; </
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>
<
s
id
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">igitur
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plures ſunt neceſſariæ, vt attollatur motu circulari; </
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<
s
id
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">igitur difficiliùs iuxta
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experimentum; adde quod cum applicatur potentia in C, punctum A,
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maius momentum habet, de quo aùàs. </
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Corollarium
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2.
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<
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<
s
id
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">Hinc ratio euidens illius experimenti, quo manifeſtè conſtat perti-</
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