Guevara, Giovanni di
,
In Aristotelis mechanicas commentarii
,
1627
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cundum verò eſt, quia in ipſo ſciſſionis actu, facta aliqua di
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ſtractione partium molis adhuc non in totum diſciſſæ, ver
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tex cunei, quo pondera vtrinque diuelli, ac moueri debe
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rent, nihil vt plurimum tangit in rimula dum ipſa vlterius
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dilatatur. </
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<
s
id
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N1501E
">Ad primum tamen reſpondetur, ſi concipiamus in cuneo
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vectes explicatos ex parte A vrgere verſus G, & ex parte
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C vrgere verſus D; verticem verò non tranſgredi punctum
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B; ſed in eo quieſcere: tunc quidem ſequi, extrema ipſorum
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vectium ſibi inuicem obſtare in puncto B, nè in contrarium
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moueantur, moueantque adiacentia pondera modo deſcri
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pto. </
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<
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">At ſi concipiamus, vt re vera eſt apicem ipſum ſimul
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pergere ad partes EF: tunc in ipſo motu optimè intellige
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mus, concurrentiam extremorum vtriuſque vectis in vni
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cum illud punctum terminatiuum verticis, nihil obſtare
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quominus pars vectis, quæ ſequitur poſt illud vbi K, impel
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lat aliam ſibi correſpondentem in mole ſcindenda verſus
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N: & pars vbi H, aliam ſimilem verſus M. </
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<
s
id
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">Siquidem hoc
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ipſo, quod vertex vlterius pergit, partes illum vtrinque con
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ſequentes in proportionatum ſibi locum ſuccedere non poſ
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ſent, niſi prius inde
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expellerẽtur
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per ſciſſionem partes molis,
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quæ eundem locum occupabant. </
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<
s
id
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N1504B
">Pars autem vbi K in
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mole ſcindenda non expellitur inde virtute vectis AB; ſicut
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nec H virtute vectis CB; cum nullam vim vtraque pati
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poſſit à vecte niſi illa nitatur in contrariam partem. </
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<
s
id
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N15054
">Ergo ex
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pulſio partis K fit virtute vectis CB, quæ contra nititur; &
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expulſio partis H, virtute vectis AB. </
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<
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">Quod eſt ipſum ver
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ticem, ſeu apicem fungi officio extremorum vtriuſque ve
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ctis ad remouendas vtrinque partes corporis ſcindendi tan
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quam ad leuanda pondera virtute impetus in contrarium
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impreſsi in alterutro extremo, vt in AC vbi applicatur po
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tentia mouentis, ſeu percutientis. </
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<
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id
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N15069
">Non igitur res ita eſt con
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cipienda quaſi vertex B tanquam extremum duorum ve
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ctium contra nitentium ſimul moueretur ad oppoſita ad
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partes M, & N: Sed vt dum ipſe vertex B mouetur ſu
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per lineam BO, partes cunei vtrinque ſequentes, ac paula-</
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