Gassendi, Pierre
,
De motu impresso a motore translato epistulae duae
,
1642
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<
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<
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">Vnum addo; nempe licere ex iſtis in
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telligi, quid ſentiendum ſit de difficultate vulgò
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excitata circa vim impreſſam projectintibus. </
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<
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">Re
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quiritur quippe quid nam hæc vis ſit in re mobili?
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</
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<
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">quomodo in ea imprimatur? </
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<
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">quomodo perduret?
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</
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<
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">quomodo euaneſcat? </
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<
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id
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">Enimverò, cùm haberi ſoleat
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vt vis actiua lapidem mouens; videtur tamen vis
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actiua, quæ projectionis cauſa eſt, eſſe in ipſo pro
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ijciente, non verò in projectare, quæ merè paſſiuè
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ſe habet. </
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<
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id
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">Id, quod in re projecta eſt, motus eſt,
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quil icet interdum nominetur vis, impetus, & c. (vt
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etiam aliquoties à nobis factitatum eſt, dum, vt fa
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ciliùs intelligamur, familares voces, quantum poſ
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ſumus, retinemus) non proptereà tamen aliud quid
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piam eſt reipſâ, quàm ipſemet motus. </
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<
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id
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">Et ſanè vnus,
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idemque motus, vel per Ariſtotelem, actio ſimùl,
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& paſſio eſt; actio proüt eſt à mouente, paſſio, proüt
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in mobili: quare vt in mouente eſt vis actiua, qua,
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moueat; ita in mobili vis paſſiua, qua moueatur:
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& dum mobile reipſâ mouetur, non in eo quærenda
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eſt vis actiua, quæ in mouente ſolo neceſſaria fuit,
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ſed paſſiua ſolùm, quæ in eo eſt, & redacta quidem,
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vt vocant, ad actum. </
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<
s
id
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id.000608
">Neque obſtat, quòd mouens
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ſeparatum ſit, aut interiiſſe etiam, conſtante motu
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accepto, poſſit; nam non proptereà requiritur, vt
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aliam, præter motum, vim à ſeipſo tranſmiſerit,
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quæ motum deinceps efficiat; ſed ſufficit vt motum
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ſemel in mobili fecerit, qui continuari abſque ip
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ſo poſſit. </
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<
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">Poteſt autem; quoniam eſt eius naturæ
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accidens, vt modò ſubjectum perſeuerans habeat, </
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