Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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velocitates ſunt in eadem ratione quam in principio caſus ;</
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id eſt, ut AC ad
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B Quando corpus deſcendit a G ad
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creſcit velocitas ut tempus ; </
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">& </
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<
s
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xml:space
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">velocitas in G eſt ad
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citatem in B, ut
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C ad
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B : </
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<
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<
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eandem rationem habent ad velocitatem in G, & </
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quales. </
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locitatem, cadendo a certa altitudine, ſive directe cadat,
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ſive per planum inclinatum devolvatur. </
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<
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inclinationis nullam adferat mutationem, poteſt corpus de-
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volvi per plurima plana varie inclinata, & </
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<
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vam, (quæ ut ex innumeris planis diverſe inclinatis concinna-
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ta conſiderari poteſt) & </
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<
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">celeritas ſemper erit eadem, quando al-
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titudo eſt æqualis. </
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<
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fig. 10.</
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ſcendat per
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B an per
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, in Beadem erit celeritas & </
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dem modo corpus movebitur per BC; </
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<
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C velocitatem, quam devolvendo per
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potuiſſet acqui-
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rere, & </
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ſet.</
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<
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1.</
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& </
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eandem curvam, in plano excavatam, ſine attritu percur-
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reret. </
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C,
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fig 1.</
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per curvam DC, & </
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ex portionibus variorum circulorum formatam, & </
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omni caſu, ad eandem altitudinem eandem percurrens curvam
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adſcendet.</
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<
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quamcunque, ſive planam, ſive curvam, acquiſivit, per a-
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liam ſuperficiem ſimilem ad eandem altitudinem, eodem tem-
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pore, adſcendere poteſt .</
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ne acquiſivit, ad eandem altitudinem per curvam quamcun-
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que adſcendere poteſt.</
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2.</
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C, per
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FAB. VIII.
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fig. 1.</
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