Marci of Kronland, Johannes Marcus - De proportione motus figurarum recti linearum et circuli quadratura ex motu

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1bos ad prop. 37. poriſ. 1. & 2. problem. 1. in lib. de proport:
motûs. Eadem verò eſt ratio reliquarum magnitudinum:
ſiue eiuſdem, ſiue alterius ſint figuræ. Nam quòd percutiens
à motu quieſcit, huius ratio eſt æqualitas ponderis: quæ to
tam in percuſſo exhaurit plagam. Vtverò circulus B ad circu
lum ſibi æqualem A, ita idem circulus ad quadratum ſibi æqua
le C: eſtque contactus utriusque in puncto G & F. ſicuti ergo A eſt
hypomochlium totius grauitatis ſeu impulſus in B; ita C hy
pomochlium eſt eiuſdem grauitatis ſeu impulſus. Impulſus
autem æqualis ad magnitudinem æqualem eandem habet
rationem.

10[Figure 10]

THEOREMA I.

Grauitas mouens partium ìn toto eſt minor grauitate mouente
extra illud totum.

Sit B grauitas mobilis, & A mundi centrum: eritque linea BA
motus centri per 3, Axioma: partium verò HD motus eidem

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