Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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MATHEMATICA. LIB. I. CAP. XI.
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<
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& </
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<
s
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xml:space
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">VEctis, ut in principio capitis præcedentis dictum, in-
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ſervit ad elevanda pondera ad parvam altitudinem;
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</
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<
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">quando altitudo major eſt, Axis in Peritrochio uſu venit.</
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<
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<
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fig. 5.</
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jus motu funis, cui affixum eſt pondus, axi circumvolvitur,
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quo pondus elevatur.</
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<
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">d e axis; </
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<
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">m potentia;
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</
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<
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hujus actione moveatur rota, puncta b & </
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">d arcus ſimiles eo
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fig. 6.</
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motu deſcribunt; </
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">arcus illi ſunt viæ percurſæ à potentiâ & </
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pondere, & </
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meter ad axis diametrum, ex quo ſequensregula deducitur.</
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<
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">Potentia eo plus valet, quo major eſt rota, & </
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<
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">illius actio
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creſcit in eâdem ratione cum rotæ diametro. </
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nus reſiſtit, quo axis diameter minor eſt, & </
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tia in eadem ratione cum axis diametro minuitur. </
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<
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tur æquilibrium inter potentiam & </
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rotædiameter ſit ad axis diametrum, in ratione inverſa
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potentiæ ad pondus .</
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<
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<
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<
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1.</
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delineatæ, in qua dantur rotæ & </
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fig. 1</
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Quando axis diameter eſt pars duodecima rotæ diametri,
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ſemilibra ſex libras ſuſtinet, & </
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<
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<
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diſtantia puncti, cui applicatur, à centro, pro rotæ ſemi-
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diametro habenda eſt.</
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<
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rotæ dentatæ reſpectu axis in peritrochio ſunt, quod
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vectis compoſitus reſpectu vectis ſimplicis.</
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