Fabri, Honoré
,
Tractatus physicus de motu locali
,
1646
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<
archimedes
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<
text
>
<
front
>
<
section
>
<
p
id
="
N1056D
"
type
="
main
">
<
s
id
="
N10589
">
<
pb
xlink:href
="
026/01/013.jpg
"/>
<
expan
abbr
="
proportionẽ
">proportionem</
expan
>
virium ad
<
expan
abbr
="
reſiſtentiã
">reſiſtentiam</
expan
>
: tùm denique, quia, cùm modico
<
lb
/>
impetu agitari poſſint ab aëre mobili, vnus motus alium impedit. </
s
>
</
p
>
<
p
id
="
N1059C
"
type
="
main
">
<
s
id
="
N1059E
">12. Singulis inſtantibus motus naturaliter accelerati creſcit
<
lb
/>
reſiſtentia; </
s
>
<
s
id
="
N105A4
">quia, cùm motus creſcat, æqualibus temporibus, plures
<
lb
/>
partes medij occurrunt; </
s
>
<
s
id
="
N105AA
">creſcunt tamen vires in eadem proportio
<
lb
/>
ne, ſcilicet, impetus: igitur non mutatur progreſſio motus. </
s
>
<
s
id
="
N105B0
">Hinc
<
lb
/>
colligo, contra Galilæum, motum rectum ex naturaliter accelerato
<
lb
/>
nunquam fieri æquabilem: dixi motum rectum; quia motus corpo
<
lb
/>
rum cœleſtium ex accelerato factus eſt æqualis. </
s
>
</
p
>
<
figure
id
="
id.026.01.013.1.jpg
"
xlink:href
="
026/01/013/1.jpg
"
number
="
7
"/>
<
p
id
="
N105BF
"
type
="
main
">
<
s
id
="
N105C1
">
<
emph
type
="
center
"/>
<
emph
type
="
italics
"/>
De motu violento ſurſum.
<
emph.end
type
="
italics
"/>
<
emph.end
type
="
center
"/>
</
s
>
</
p
>
<
p
id
="
N105CC
"
type
="
main
">
<
s
id
="
N105CE
">1. MOtus violentus ſurſum vulgò dicitur eſſe à principio ex
<
lb
/>
trinſeco. </
s
>
<
s
id
="
N105D3
">Triplici modo accidere poteſt: </
s
>
<
s
id
="
N105D7
">primò, ſi reuerà
<
lb
/>
imprimatur impetus ab extrinſeco, vt, cùm mitto lapidem ſurſum: </
s
>
<
s
id
="
N105DD
">
<
lb
/>
ſecundò, ſi corpus deorſum cadens deinde reflectatur ſurſum; </
s
>
<
s
id
="
N105E2
">tunc
<
lb
/>
autem nihil eſt ab extrinſeco, niſi determinatio noua, quæ eſt à cor
<
lb
/>
pore reflectente: </
s
>
<
s
id
="
N105EA
">tertiò, ſi terra vtrinque eſſet peruia; </
s
>
<
s
id
="
N105EE
">nam lapis haud
<
lb
/>
dubiè non ſiſteret in centro, ſaltem poſt primum deſcenſum; </
s
>
<
s
id
="
N105F4
">igitur
<
lb
/>
aſcenderet per eandem lineam; </
s
>
<
s
id
="
N105FA
">nullum tamen eſt principium ex
<
lb
/>
trinſecum; igitur motus violentus dicit tantùm motum ſurſum
<
lb
/>
corporis grauis. </
s
>
</
p
>
<
p
id
="
N10602
"
type
="
main
">
<
s
id
="
N10604
">2. Dari autem motum violentum, dubium eſſe non poteſt, qui
<
lb
/>
ſupponit impetum, vel impreſſum ab extrinſeco, vel in deſcenſu
<
lb
/>
acquiſitum, qui reuerâ ineſt ipſi mobili, cùm ipſum medium hunc
<
lb
/>
motum potiùs impediat, quàm iuuet: </
s
>
<
s
id
="
N1060E
">hinc, ſi nullus eſſet impetus
<
lb
/>
extrinſecus, vel acquiſitus, nullus eſſet motus violentus; quia im
<
lb
/>
petus innatus illius cauſa eſſe non poteſt. </
s
>
<
s
id
="
N10616
">Portò hic motus non eſt
<
lb
/>
acceleratus, nec æqualis, alioquin
<
expan
abbr
="
nunquã
">nunquam</
expan
>
rediret deorſum mobile. </
s
>
</
p
>
<
p
id
="
N1061F
"
type
="
main
">
<
s
id
="
N10621
">3. Hinc neceſſariò eſt retardatus: </
s
>
<
s
id
="
N10625
">igitur deſtruitur impetus, non
<
lb
/>
quidem ab ipſa medij reſiſtentia; </
s
>
<
s
id
="
N1062B
">quippe idem medium non magis
<
lb
/>
reſiſtit motui ſurſum, quàm motui deorſum, vt patet: </
s
>
<
s
id
="
N10631
">igitur deſtrui
<
lb
/>
tur ille impetus motus violenti ab impetu innato aliquo modo; </
s
>
<
s
id
="
N10637
">non
<
lb
/>
quidem vt à contrario ratione entitatis, ſed ratione determinatio
<
lb
/>
nis: </
s
>
<
s
id
="
N1063F
">cùm enim impetus innatus exigat motum deorſum, & alius ſur
<
lb
/>
ſum: </
s
>
<
s
id
="
N10645
">hic quidem præualet, attamen fruſtrà eſt, ratione gradus
<
lb
/>
æqualis impetui innato: igitur deſtruitur ille gradus illo inſtanti. </
s
>
</
p
>
</
section
>
</
front
>
</
text
>
</
archimedes
>