Marci of Kronland, Johannes Marcus
,
De proportione motus figurarum recti linearum et circuli quadratura ex motu
,
1648
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tum impulſum abſumit: cùm non tota vis centri percutiat. ne
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ceſſe ergò mobile ab eiuſmodi plagâ motum continuare. </
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>Notandum Quintò, hanc differentiam eſſe inter corpora
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percuſſa, quæ ex illâ plagâ moventur, & quæ immota manent.
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quòd hæc ictum recipiant
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reddantq́
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;, nequaquam illa: pro
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pterea, quòd licet ab his contactus fiat, non tamen etiam pla
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ga: eſt enim plaga irruptio quædam violenta, & veluti pene
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tratio: at verò quæ à plagâ moventur, nullam faciunt irrup
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tionem, ſed à plagâ celeriter ſe adducunt: non igitur percu
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tere dicuntur. </
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>Immota verò quia percuſſioni non cedunt
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eadem violentiâ irrumpunt
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penetrantq;
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in ea, à quibus pene
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trantur: unde percuti & percutere, & impulſum recipere
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da-req;
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reque</
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dicuntur. </
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>Qui ſummus eſt in contactu: Inde verò ſen
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ſim attenuatur. </
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>Et in percuſſo quidem ex illâ vibratione de
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mum conquieſcit: in percutiente verò quia priori eſt contra
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rius, ipſum retroagit. </
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<
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>Dices quid ſi dicamus impulſum non
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niſi per contrarium impulſum tolli? Nam ſi globus alium per
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cutiat ſibi æqualem & quieſcentem, ex illâ communi plagâ in
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utroq;
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producitur impulſus: qui globum quieſcentem loco
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movet. propterea quòd huic motui nihil ſit contrarium: alte
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rum verò ob impulſûs contrarictatem à motu continet. </
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>Reſpondeo, licet hæc ratio ſit probabilis, non tamen in alijs
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locum habere. </
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>Nam cùm maiori immoto minor globus allidi
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tur, ſi æqualem dat
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recipitq́
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; impulſum,
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eſtq́
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hic contrarius pri
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ori, non reſiliet; verùm à motu conquieſcet. </
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<
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>Dices à maiori corpore ictum fieri maiorem; ac proinde ab
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huius exceſſu fieri illum motum. </
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>Sed contra, quia velocitas
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motûs reflexi non augetur in eá ratione, in quâ illorum cor
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porum magnitudo. </
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<
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>Deinde cùm duo globi æquales ſe
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percutiunt in motu,
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uterq;
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reflectit: oportebat verò
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utrumq;
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