Ceva, Giovanni, Geometria motus, 1692

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              torum motuum ex ſimplicibus geneſibus, quæ ſint in ea­
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              dem altitudine DFG, KFG, ſunt in reciproca ratione am­
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              plitudinum, ſeu primarum velocitatum KG ad DG, vel
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              BC; ex æquali igitur ſpatia acceleratorum motuum ex
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              propoſitis ſimplicibus geneſibus BAC, KFG nectentur ex
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              ratione duplicata altitudinum AC ad FG, & reciproca
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              amplitudinum KG ad BC earundem geneſum BAC,
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              KFG. </s>
              <s id="s.000724">Quod &c. </s>
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              Tab.
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              7.
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              fig.
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              6.</s>
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              28.
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              huius.
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            <p type="margin">
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              29.
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              huius.
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              Scholium.
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              At quia in ſpatijs, quæ accelerato motu peraguntur; non
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              ſeruatur ratio altitudinum geneſum ſimplicium, ex quo ori­
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              tur in hac methodo quædam percipiendi difficultas; ideo ſe­
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              quenti problemate, alijſque iam notis veritatibus, rem planè
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              illuſtrabimus, ac ſimul doctrina vſum trademus.
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              PROP. XXXI. PROB. VI.
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              <s id="s.000731">EX datis ſpatijs accelerato motu confectis, cognitiſ­
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              que primis, aut poſtremis ſimilium, ſimpliciumque
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              motuum velocitatibus, reperire tempora ipſorum de­
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              curſuum. </s>
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              <s id="s.000732">Spatia motibus acceleratis exacta ſunt C, D, & velo­
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              tates, ſeu amplitudines geneſum ponantur eſſe A, B, ſcili­
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              cet A principio motus per C, & B initio motus per D, quæ­
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              ritur ratio temporum, quibus exiguntur propoſita ſpatia.
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              </s>
              <s id="s.000733">Vt A ad B, ita fiat C ad E, & inter E, et D ſumatur F me­
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              dia proportionalis. </s>
              <s id="s.000734">Dico ipſa tempora eſſe vt E ad F.
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              </s>
              <s id="s.000735">Componuntur ſpatia acceleratis motibus exacta ex ratio­
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              ne quadratorum temporum, & ex ea amplitudinum, ſeu
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              homologarum velocitatum in ſimplicibus motibus, ſimili­
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              buſque ſumptarum; & ideo temporum quadrata necten­
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              tur ex ratione ſpatiorum C ad D, & ex reciproca ampli-</s>
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          </chap>
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