Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. I. CAP XXIV.
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<
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actionem.</
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<
s
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xml:space
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">Licet circa ſummæ virium æqualitatem ante & </
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nullum poſſit, cum hæc ex ipſa perſecta claſticitate ſequatur , & </
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<
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xml:space
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">557.</
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utin præcedenti ſcholio fecimus, ex regulis computationis deducatur, obſcurum
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quid nihilominus in hiſce dari non diffiteor; </
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<
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xml:space
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">cum ex demonſtratis non pa-
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teat, quomodo elaſterium, quod dum ſe inter corpora expandit, & </
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oppoſitas vires, quæ ſuntinverſè ut maſſæ, communicat , poſſit ſæpe
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corpori integram non modo, qua ſe expandit, imprimere vim; </
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<
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ea quantum ex vi aliûs corporis tollit. </
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<
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<
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xml:space
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bus velocitatis, id eſt, cum quatuor grad. </
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<
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xml:space
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">vis , incurrat in corpus B æquale quieſcens, poſt ictum, ſepoſita elaſticitate, ambo unico gradu velocitatis gau-
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dent & </
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& </
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<
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ſint elaſtica, hac ipſa vielaſterium fuit flexum, & </
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<
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">eadem vi ſeſe expandit :</
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Poſt ictum verò corpus B duos habet gradus velocitatis , id eſt vim
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tuor , & </
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& </
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flexum; </
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">& </
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<
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">licet propter corpora æqualia, æquales impreſſiones ab utraque
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parte exeruerit.</
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<
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<
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dum. </
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ut maſſæ, ſi inter corpora quieſcat ; </
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<
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motu cum hiſce feratur; </
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<
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nave quæ eadem velocitate cum corporibus fertur, & </
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laſterio quieſcunt ; </
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<
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">ſed propoſitio hæc ad motus abſolutos referrinon debet,
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rum unus acceleratur, alter retardatur, translato jam ipſo elaſterio ante hu-
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jus actionem, ad caſum ita conſideratum demonſtratio propoſitionis appli-
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cari nequit.</
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<
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">Circa vires abſolutas notandum, has corpori ſæpe communicari, cauſâ mo-
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venti quæ ipſa transfertur, in quo caſu non ſola cauſa movens in corpus agit,
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ſed & </
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">in corpus datur actio illa quæ ipſam transfert canſam moventem, corporique
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communicatur vis, quæ valet ſummam barum actionem ; </
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<
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fectus ambarum actionum conjunctarum; </
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lium nullum effectum edunt. </
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<
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">Quando elaſterium obſtaculo inſiſtit quod ad partem oppoſitam non cedit,
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totam vim qua fuit infiexum corpori quod ab obſtaculo repellit communicat,
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ut hoc antea notavimus , & </
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experimentis memoratis addita propoſitione n. </
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<
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">quæ, poſitâ perfectâ
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ſticitate, in dubium a nemine vocatur, neque vocari poteſt.</
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<
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totam ſuam ad oppoſitam partem vim exerat, multo magis Elaſterium quod
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ad illam transſertur partem ad quam agit, integram vim, quarelaxatur, corpori com-
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municabit, cui etiam imprimet vim quæ valet actionem, quæ ipſum transfert ela-
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ſterium dum relaxatur .</
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