Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              Theorema
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              52.
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            <p id="N2010A" type="main">
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              Deſtruitur impetus cum ſcilicet mobili impacto in planum atteruntur par­
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              tes vel plani, vel mobilis, vel vtriuſque,
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              ſic cum ſaxum alliditur molliori la­
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              pidi, prima ſuperficies reſiſtit quidem; </s>
              <s id="N20119">at certè minùs quàm par ſit, vt
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              ſiſtat mobile; </s>
              <s id="N2011F">deſtruitur tamen aliquid impetus, quia impeditur tantil­
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              lùm ſaltem prima illa determinatio; </s>
              <s id="N20125">Secunda ſuperficies reſiſtit etiam in
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              maiori ſcilicet proportione, tùm quia impetus euaſit infirmior ex primo
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              quaſi conflictu, tùm quia paulò durior eſt ſecunda ſuperficies quàm pri­
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              ma, quod ſcilicet aliquæ partes quaſi intrudantur in vacuitates interce­
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              ptas; </s>
              <s id="N20131">ſic pila lignea multis ictibus confuſa durior eſt; </s>
              <s id="N20135">denique tertia ſu­
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              perficies reſiſtit in maiori proportione quàm ſecunda & quarta quàm
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              tertia; </s>
              <s id="N2013D">atque ita deinceps, donec tandem, vel totus impetus vincatur, vel
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              determinatio prior ſuperetur: </s>
              <s id="N20143">hinc ſi alterantur partes plani tantùm, mi­
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              nùs impetus deſtruetur, quàm ſi atterantur partes mobilis; quia impetus
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              partium mobilis attritarum totus deſinit, nec vllam vim ampliùs facit,
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              quod potiori iure dicendum eſt, ſi atterantur partes vtriuſque. </s>
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              Theorema
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              53.
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            <p id="N2015B" type="main">
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              Hinc pluribus licèt inſtantibus mobile tangat planum, non tamen vllo quie­
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              ſcit
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              ; alioqui ſemper quieſceret per Th.50. </s>
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              Theorema
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              54.
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              </s>
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              Hinc cum atteruntur partes plani ab impactione mobilis, minor eſt reflexio
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              ; </s>
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              quia minor eſt cauſa, ſcilicet impetus, quæ minor eſt adhuc ſi atterantur
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              partes mobilis, & minor adhuc, ſi partes vtriuſque; quæ omnia conſtant
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              ex dictis. </s>
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              Theorema
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              55.
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              </s>
            </p>
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              Cum reſiliunt partes mobilis, destruitur impetus pen ſe, quia ſcilicet illa di­
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              uiſio, vel ſolutio continuitatis ſeu plexus reſiſtit
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              ; </s>
              <s id="N201A5">igitur impedit, ſed omne im­
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              pedimentum detrahit aliquid impetus: </s>
              <s id="N201AB">dixi per ſe, nam per accidens fieri
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              poteſt, vt aliqua particula reſiliens maiore cum impetu moueatur, vt pa­
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              tet aliquando experientiâ; quia præter priorem impetum, qui cum aliis
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              partibus illi communis erat, additur alius propter nouam alliſionem, ſeu,
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              quod mirabilius eſt, cum aliqua particula ex maiore maſsâ diuellitur, im­
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              petus totius mobilis quaſi migrat in particulam illam, perinde quaſi ab
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              eo emitteretur, id eſt cum antè totum mobile velociſſimo motu ferretur,
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              particula auulſa, eodem deinde mouetur. </s>
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              Theorema
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              56.
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              </s>
            </p>
            <p id="N201CB" type="main">
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              Porrò reſiliunt particulæ mobilis per omnes ferè lineas, quæ determinantur
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              per accidens à forma vel ſectione diuiſionis
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              ; </s>
              <s id="N201D8">quæ enim dextrorſum ſeparan­
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              tur, dextrorſum eunt; </s>
              <s id="N201DE">atque ita in omnem partem ſine alia regula; </s>
              <s id="N201E2">cur
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              verò ab ictu diuellantur partes, non eſt huius loci diſcutere; </s>
              <s id="N201E8">ſic enim
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              quaſi finditur ſaxum ex colliſione; </s>
              <s id="N201EE">tùm quia ex illo omnium partium
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              ſuccuſſu ſoluitur illarum nexus; </s>
              <s id="N201F4">tùm quia intruduntur aliquæ partes, </s>
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