Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
s
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N10C4B
">13. Cum duo globi in ſeſe inuicem impinguntur æquali motu,
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minor retroagitur velociore motu, quàm ante moueretur, vt clarum
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eſt: </
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<
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id
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N10C53
">maior verò, ſi duplus eſt alterius, ſiſtit immobilis in puncto
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contactus; </
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<
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id
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N10C59
">ſi maior duplo ſuum iter proſequitur, ſed tardiore mo
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tu; ſi minor duplo, retroagitur: quæ omnia facilè ex dictis demon
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ſtrantur. </
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<
s
id
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N10C61
">Poteſt impetus eſſe æqualis alteri, & præualere; poteſt
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æqualem impetum producere hoc inſtanti, & ſtatim inſtanti, quod
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ſequitur, totus deſtrui. </
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<
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N10C69
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<
s
id
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">14. Poteſt globus retroagi in plano horizontali, licèt in aliud cor
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pus non incidat, ita vt initio tendat in ortum, verbi gratia: </
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<
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id
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N10C71
">tùm
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deinde, licèt nihil prorſus addatur, versùs occaſum; </
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<
s
id
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N10C77
">quod accidit,
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cum globus vtroque motu, centri, ſcilicet, & orbis, mouetur, ſed
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contrario; primùm enim motus centri præualet, ſed facilè cedit
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propter attritum maiorem partium. </
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<
s
id
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N10C81
">Nullus datur propriè motus
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refractus: </
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<
s
id
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N10C87
">licèt enim incuruetur linea motus, dum per aquam ſu
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bit mobile; hæc tamen eſt reflexionis ſpecies. </
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<
s
id
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">15. Globus reflectens, qui ab ictu alterius mouetur, non mouetur
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inſtanti contactus; </
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>
<
s
id
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N10C95
">quia impetus primo inſtanti, quo eſt, non mo
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uetur; </
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>
<
s
id
="
N10C9B
">producitur enim impetus primo inſtanti contactus: </
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<
s
id
="
N10C9F
">ſi impe
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tus eſſet tantùm determinatus ad vnam lineam, nulla fieri poſſet
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reflexio, ſed tantùm repercuſſio; </
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>
<
s
id
="
N10CA7
">quia veriſſima cauſa reflexionis
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conſiſtit in noua determinatione: </
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<
s
id
="
N10CAD
">per reflexionem poſſunt colligi
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plures partes aëris ſonori ad Echometriam: </
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>
<
s
id
="
N10CB3
">ſagitta emiſſa per ho
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rizontalem ſursùm, tantillùm aſcendit per arcum; quia tantillùm
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reflectitur ab aëre. </
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De motu circulari.
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<
s
id
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N10CCF
">1. DAri motum circularem, probatur infinitis ferè experimen
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tis: </
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>
<
s
id
="
N10CD5
">cuius ratio à priori eſt, quòd poſſint extremitates eiuſ
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dem cylindri in partes oppoſitas pelli; </
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>
<
s
id
="
N10CDB
">vnde ſequitur neceſſariò
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motus circularis; quem ij negare coguntur, qui ex punctis mathe
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maticis quantitatem componunt. </
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>
<
s
id
="
N10CE3
">Motus circularis in ſublunaribus
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oritur ex recto impedito; </
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>
<
s
id
="
N10CE9
">quia, ſcilicet, determinatur tantùm im
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petus ad lineam rectam: </
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>
<
s
id
="
N10CEF
">hinc quidam motus circularis eſt merè
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per accidens, vt cùm retinetur extremitas funependuli, ſeu </
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>
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</
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</
front
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</
text
>
</
archimedes
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