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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redit non modo amittere priſtinam velocitatem, ſed præte-
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rea pro velocitate amiſſa etiam haberi velocitatem, in con-
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trariam partem acquiſitam; </
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<
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xml:space
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">in hoc caſu ſumma ambarum
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harum velocitatum duplicanda eſt & </
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<
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trahenda. </
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citur, exceſſus in contrariam partem ſumendus eſt.</
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<
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2.</
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<
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xml:space
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<
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pingitur in corpus quieſcens Q, cujus maſſa eſt unum;
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fig. 5.</
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poſt impactum Q fertur celeritate duodecim, & </
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tum continuat velocitate tria; </
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<
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lis congruit: </
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">nam ſi corpora non eſſent elaſtica, celeritas
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amborum poſt occurſum eſſet ſex ; </
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<
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xml:space
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quireret ſex gradus velocitatis; </
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nunc duodecim gradus. </
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tate amittit tres gradus velocitatis, per Reg. </
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ſex, quiſi ſubtrahantur a novem, velocitate priori, reſtant
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tres gradus velocitatis.</
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<
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3.</
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<
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<
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currit in corpus Q, cuius maſſa eſt unum, & </
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fig. 6.</
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tate quinque eandem partem verſus fertur; </
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corpus Q movetur velocitate novem, & </
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fertur. </
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determinari. </
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tate ſeptem poſt impactum moverentur . </
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<
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reret duos gradus celeritatis, qui per Reg. </
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bent, & </
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vem: </
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<
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<
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4.</
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<
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<
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duodecim impingitur, & </
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fig. 7.</
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caſu corpora non elaſtica moverentur celeritate tria; </
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pus ergo Pamiſiſſet novem gradus velocitatis, amittit ergo per
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Reg. </
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