Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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391 - 420
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percipitur quomodo à naturali operatione, deſcen
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ſus nempè deorſum, produci debeat operatio
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contraria, aſcenſus nimirum alterius partis eiuſdem
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fluidi ſcilicet recedendo a centro telluris. </
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<
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operæpretium perſpicuè oſtendere veritatem præ
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dictæ operationis, eamque deducere ex principijs
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magis notis, & euidentibus. </
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Cap. 2. dę
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momentis
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grauium in
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fluido inna
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tantium.</
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PROPOSITIO I.
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Grauis ſuſpenſi non ex centro ſuæ grauitatis vna eius pars
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ſurſum aſcendit quiæ integrum graue
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deſcendit.
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bus partibus in extremitatibus eiuſdem libræ
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horizontalis AB diſpoſitis, & commune centrum gra
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uitatis earum ſit D. ſuſti
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neatur poſtea, fulciatur
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que tota libra ex puncto
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C remoto à centro graui
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tatis D. dico quòd pars
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eius oppoſita B ſurſum̨
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aſcendet per arcum BF,
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hac ſolummodo de cauſą
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quia integrum graue AB magis, quàm prius ad cen
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trum terræ accedit. </
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<
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exercent ſuam grauitatem & conatum compreſſiuum
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in centro communi earum grauitatum D; eſt que
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prædictum centrum D remotum à fulcimento ſtabili
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C, igitur efformabitur veluti fune-pendulum CD </
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