Gravesande, Willem Jacob 's
,
Physices elementa mathematica, experimentis confirmata sive introductio ad philosophiam Newtonianam; Tom. 1
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PHYSICES ELEMENTA
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eòque hoc ſuſtinent, propter æqualitatem inter potentias
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& </
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<
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5.</
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<
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lineato, quod ulteriori explicatione non indiget.</
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<
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fig. 4.</
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<
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6.</
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<
s
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">Quando unâ potentiâ duo pondera ſuſtinenda ſunt, potentiam
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inter pondera poni neceſſe eſt, & </
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<
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fig. 1.</
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potentiis dicta ſunt, ad pondera applicari debent. </
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<
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ra enim ſuſtineri non poſſunt, niſi horum commune cen-
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trum gravitatis ſuſtineatur.</
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<
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</
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<
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">Plurima pondera ſæpe unâ, aut plurimis potentiis, ſuſti-
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nentur aut vehuntur. </
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<
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dera, babere commune centrum gravitatis; </
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tale eſt, ut ſi ab utraque parte unumquodque pondus mul-
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tiplicetur per ſuam diſtantiam ab iſto puncto, ſumma produ-
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ctorum ab utraque parte ſit eadem .</
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<
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<
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">Potentiæ etiam utcunque diſpoſitæ commune babent gravi-
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tatis centrum; </
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<
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">poſſunt enim per pondera repræſentari
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& </
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<
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">hìc intenſitas uniuſcujuſque potentiæ perſuam diſtantiam à
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centro multiplicari debet, & </
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erunt ab utraque parte æquales.</
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</
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<
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<
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">Vt potentiæ ad pondera ſuſtinenda valeant, requiritur po-
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tentiarum & </
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<
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<
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omnium ponderum, omniumque potentiarum, vires in u-
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num & </
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<
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ſurſum & </
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<
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7. & 8.</
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<
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notat centrum gravitatis & </
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<
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fig. 2. & 3.</
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9</
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<
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à potentiis trahatur; </
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fig 4.</
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que parte horizontaliter trahitur, in quo æquilibrium non
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datur niſi in caſu memoratarum regularum.</
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ſuſtineri debere.</
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