Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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quoque deſcenſus termini A eiuſdem libræ, vt
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eſt; & ſiquidem pondus F æquale fuerit ponderi
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DE, tunc efficietur æquilibrium, quia dùm ambo
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dera</
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conantur deſcendere deorsùm transferre quę
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duos terminos libræ versùs infimum ſignum
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quadrã-
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tis I, & hoc efficitur æquali vi, & impetu, procùl du
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bio vna vis, & conatus impedit motum, &
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defcensũ
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alterius, & ex hoc mutuo
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impedimẽto
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reſultat quies
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totius libræ in ſitu horizontali; at ſi pondus F æqua
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Ie fuerit vni portioni D totius ponderis DE, tunc
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præua lente maiori pondere deprimet terminum librę
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A versùs I, aſcendetque oppoſitus terminus B versùs
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H tanta vi quæ ſit æqualis exceſſui ponderis E. </
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colligitur quod in libra, vel rota duo æquales im
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petus ad eaſdem partes
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tendẽ-tes
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tes</
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, nempè deorsùm, ideoquę
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ſimiles inter ſe, ſe mutuo impe
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diunt, & deſtruunt, itaut quies
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conſequatur, ſi verò eorumdem
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ſimilium motuum
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deſcendentiũ
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vires inæquales fuerint, præua
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lebit maius pondus, libramque
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reuoluet non integra ſua vi, ſed tantummodò illa dif
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ferentia, vel exceſſu, quo maius pondus ſuperat
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minus. </
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