Fabri, Honoré, Tractatus physicus de motu locali, 1646

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              cum enim non poſſit moueri vna pars rotæ ſine alia; </s>
              <s id="N221D0">certè, vel impetus
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              imprimitur omnibus, vel nulli per Th.37. lib.1.præſertim cùm totus im­
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              petus, qui rotæ imprimitur, ſit ab extrinſeco; nec enim accidit huic rotæ,
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              quod alteri, quæ ſitum verticalem habet, cuius ſemicirculus, cui admoue­
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              tur potentia per lineam deorſum motu naturali ex parte deorſum fertur,
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              vt ſupra explicatum eſt. </s>
              <s id="N221DE">Hinc totus impetus in rota horizontali produ­
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              citur ab extrinſeco; hinc ab ea tantùm potentia volui poteſt, quæ tot
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              partes impetus poteſt producere, quot ſunt neceſſariæ, vt omnibus parti­
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              bus plani illius circularis diſtribuantur, iuxta propagationem, quæ motui
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              circulari competit. </s>
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            <p id="N221EA" type="main">
              <s id="N221EC">
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              Theorema
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              44.
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              </s>
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            <p id="N221F8" type="main">
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              Hinc in vtroque ſemicirculo plani producitur impetus ab ipſa potentia ap­
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              plicata, non vero ab impetu producto in altero ſemicirculo producitur impetus
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              in alio,
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              vt conſtat ex dictis; </s>
              <s id="N22207">ſit enim rota horizonti parallela ABCD, &
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              applicetur potentia in A per AO, non poteſt produci impetus in radio
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              AE, niſi tollatur impedimentum; </s>
              <s id="N2220F">impedit autem radius EC eo primo
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              inſtanti; </s>
              <s id="N22215">igitur debet ſimul tolli impedimentum, & produci impetus in
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              AE; </s>
              <s id="N2221B">ſed non poteſt tolli impedimentum, niſi per impetum; </s>
              <s id="N2221F">igitur non
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              modò producitur impetus in AE, ſed etiam in EC; </s>
              <s id="N22225">atqui impetus in
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              EC non producitur ab impetu producto in EA; </s>
              <s id="N2222B">applicetur enim poten­
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              tia in F; </s>
              <s id="N22231">certè minùs impetus producetur in FE, quàm in EC, vt con­
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              ſtat; </s>
              <s id="N22237">igitur impetus in EC producitur ab ipſa potentia applicata in A,
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              vel in F; ſi verò rota ſit verticalis, ab eadem potentia, & impetu innato
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              radij AE. vel ſemicirculi DA BE. </s>
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            <p id="N22240" type="main">
              <s id="N22242">
                <emph type="center"/>
                <emph type="italics"/>
              Theorema
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              45.
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              </s>
            </p>
            <p id="N2224E" type="main">
              <s id="N22250">
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              Hinc faciliùs mouetur rota motu illo circulari, quàm recto
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              ; </s>
              <s id="N22259">quia ſit dia­
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              meter AC, vt moueatur motu recto per ſe debet produci impetus eiuſ­
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              dem perfectionis in omnibus partibus AC, vt conſtat ex dictis lib. 1. ſi
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              enim motus omnium partium eſt æqualis; </s>
              <s id="N22263">igitur & impetus, at verò, vt
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              moueatur motu circulari in plano horizontali facto ſcilicet circulo
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              ABCD, & admota potentia in A; </s>
              <s id="N2226D">certè impetus qui producitur in A,
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              & in C, eſt minor impetu producto in F, & in H; </s>
              <s id="N22273">igitur ſi producatur
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              in A impetus eiuſdem perfectionis ad motum circularem cum eo, qui
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              produceretur admotum rectum; </s>
              <s id="N2227B">haud dubiè totus impetus productus in
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              AC ad motum rectum eſt perfectior toto impetu producto ad circula­
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              rem; igitur difficiliùs ille, hic faciliùs producitur. </s>
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            <p id="N22283" type="main">
              <s id="N22285">
                <emph type="center"/>
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              Theorema
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              46.
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              </s>
            </p>
            <p id="N22291" type="main">
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              Si applicetur potentia in F, difficiliùs mouebit rotam, quàm ſi applicetur in
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              A
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              ; </s>
              <s id="N2229E">ratio clara eſt, quia producet in F impetum eiuſdem perfectionis,
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              quem produceret in A, vt certum eſt; </s>
              <s id="N222A4">igitur maior erit impetus in to­
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              ta AC; </s>
              <s id="N222AA">igitur difficiliùs mouebitur rota: adde quod longitudo vectis
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              iuuat motum EC. </s>
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