Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

Table of figures

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              Cap. 10. de
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              æquitempo­
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              ranea natu­
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              rali veloci­
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              tate
                <expan abbr="grauiũ">grauium</expan>
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              <s id="s.002292">Hinc deducitur, quòd figura acuminata eiuſdem̨
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              corporis grauis omninò inutilis eſt, nec motum eius
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              facilem reddit, quando motus fieri debet in ſpatio
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              prorsùs inani, non verò in medio fluido quieſcente; </s>
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              propterea quòd vis motiua eius naturalis nullam me­
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              dij reſiſtentiam ſuperare debet, ſcilicèt neque medij
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              fluidi quieſcentis ibi non exiſtentis, inertiam, aut
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              grauitatem, contiguitatem, aut glutem ſuperare de­
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              bet, ſcilicèt quando nihil ei obſiſtit, nec eius
                <expan abbr="impetũ">impetum</expan>
              ,
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              aut progreſſum impedire, & retardare poteſt.
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              III.</s>
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              IV.</s>
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              <s id="s.002296">E contrà figura obtuſa, & ampla eiuſdem corpo­
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              ris grauis nihil nocet, nec planè retardare poteſt mo­
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              tum eiuſdem corporis grauis in vacuo, quia nimirum
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              nihil ei reſiſtit, neque enim
                <expan abbr="inertiã">inertiam</expan>
              medij fluidi quie­
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              ſcentis ibi non exiſtentis ſuperare debet, id è ſuo lo­
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              co expellendo, neque eius grauitatem,
                <expan abbr="contiguitatẽ">contiguitatem</expan>
              ,
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              aut gluten ſua vi motiua vincere debet. </s>
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              V.</s>
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              <s id="s.002299">Cùm velocitates grauium
                <expan abbr="cadentiũ">cadentium</expan>
              non ſint æqua­
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              biles, ſed vniformiter acceleratæ, ideò quando com­
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              parantur inter ſe gradus velocitatum duorum corpo­
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              rum deſcendentium, intelligi ſemper debent gradus
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              initiales, ſcilicèt illi, qui ab eodem termino quietis
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              temporibus æqualibus exercentur, & vniformi pro­
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              greſſu creſcunt. </s>
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            <p type="main">
              <s id="s.002300">His præmiſſis demonſtrari poſſunt ſequentes pro­
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              poſitiones. </s>
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