Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              reſiſtentia autem conſideratur in globo impacto, cuius reſiſtitur motui; </s>
              <s id="N206D2">
                <lb/>
              ceſſio verò in alio, qui motui cedit; </s>
              <s id="N206D7">appello autem infinitam reſiſten­
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              tiam cui nulla reſpondet ceſſio; </s>
              <s id="N206DD">nihil enim aliud præſtaret infinita; </s>
              <s id="N206E1">por­
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              rò cum nulla eſt ceſſio, determinatio noua eſt dupla prioris, vt demon­
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              ſtratum eſt ſuprà; </s>
              <s id="N206E9">igitur nihil prioris remanet; </s>
              <s id="N206ED">cum verò nulla eſt reſi­
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              ſtentia, tota prior remanet, & nulla eſt noua: </s>
              <s id="N206F3">denique cum ceſſio æqua­
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              lis eſt reſiſtentiæ, tantùm remanet prioris quantùm eſt nouæ; </s>
              <s id="N206F9">igitur
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              vtraque æqualis eſt: Vnde vides, ni fallor, perfectam analogiam, &c. </s>
              <s id="N206FF">Ob­
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              ſeruaſti ni fallor, quod in hac re potiſſimum eſt. </s>
              <s id="N20704">Primò, tunc eſſe infini­
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              tam reſiſtentiam, cum nulla eſt ceſſio: vt in corpore reflectente prorſus
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              immobili. </s>
              <s id="N2070C">Secundò, tunc eſſe infinitam ceſſionem, cum nulla eſt reſi­
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              ſtentia vt in vacuo. </s>
              <s id="N20711">Tertiò, æqualitatem ceſſionis, & reſiſtentiæ æquali­
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              ter ab vtroque diſtare; tantùm enim eſt inter æqualitatem illam, & in­
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              finitam ceſſionem quantum inter eandem æqualitatem, & infinitam re­
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              ſiſtentiam. </s>
              <s id="N2071B">Quartò ab infinita ceſſione ad æqualitatem accedere nouam
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              determinationem æqualem priori. </s>
              <s id="N20720">Quintò, ab eadem æqualitate ad in­
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              finitam reſiſtentiam
                <expan abbr="tantũdem">tantundem</expan>
              accedere, ac proinde nouam determi­
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              nationem eſſe duplam prioris; ex quo etiam probatur æqualitas angulo­
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              rum incidentiæ, & reflexionis. </s>
            </p>
            <p id="N2072E" type="main">
              <s id="N20730">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              67.
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              </s>
            </p>
            <p id="N2073C" type="main">
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              Si globus maior impingatur in minorem per lineam obliquam ſemper re­
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              flectitur, licèt aliquando inſenſibiliter, quia fit determinatio mixta ex noua &
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              priore, cuius proportio determinari poteſt
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              ; ſit enim determinatio noua ad
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              priorem in linea incidentiæ perpendiculari vt C
                <foreign lang="grc">δ</foreign>
              ad CA fig. </s>
              <s id="N20751">Th. 65.
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              vel vt AZ ad AF, ſit linea incidentiæ obliqua EA producta in B; </s>
              <s id="N20757">
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              certè ſi determinatio noua per lineam incidentiæ obliquam EA eſt ad
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              priorem, vt AZ ad AF; </s>
              <s id="N2075E">ſumatur B
                <foreign lang="grc">υ</foreign>
              æqualis AY; </s>
              <s id="N20766">ducantur Y
                <foreign lang="grc">υ</foreign>
              A
                <foreign lang="grc">υ</foreign>
                <lb/>
              dico A
                <foreign lang="grc">υ</foreign>
              eſſe lineam reflexionis, quia eſt mixta ex AY & AB, vt con­
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              ſtat ex dictis; Idem dico de aliis incidentiæ. </s>
            </p>
            <p id="N20779" type="main">
              <s id="N2077B">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              68.
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              </s>
            </p>
            <p id="N20787" type="main">
              <s id="N20789">
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              Si globus in æqualem globum impingatur, qui æquali impetu in eum etiam
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              impingitur per lineam connectentem centra
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              ; </s>
              <s id="N20794">vterque retro agitur æquali
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              pœnitus motu, quo ſuam lineam vlteriùs propagaſſet, ſi in alterum glo­
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              bum non incidiſſet per Th.137.lib.1.ſi autem inæquali impetu mouean­
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              tur, non eſt determinatum ſuprà; poteſt autem ſit determinari, fig. </s>
              <s id="N2079E">1.
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              Tab.1.ſit globus A impactus in alium B motu vt 4. eodem tempore, quo
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              globus B impingitur in A motu vt 2. certè globus B retrò agetur motu vt
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              4. quippè ſiue moueatur æquali motu, ſiue minori, ſiue etiam quieſcat,
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              ſemper æquali motu à globo A impelletur; quod certè mirabile eſt; pri­
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              mum conſtat per Th. 135.lib. tertium conſtat per Theor.128.lib.1. </s>
              <s id="N207AC">Igi­
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              tur ſecundum conſtat, ſi enim impellitur motu vt 4.dum in contrariam
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              partem mouetur vt 4. multò magis ſi tantùm mouetur vt 2. & ſi tantùm
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              impellitur motu vt 4. dum quieſcit multò magis motu vt 4. dum in </s>
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