Marci of Kronland, Johannes Marcus, De proportione motus figurarum recti linearum et circuli quadratura ex motu, 1648

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1pla, per 1. lemma: erit grauitas quieſcens in utroque triangulo
æqualis; ac proinde æqualiter grauitabit.
At verò ſi augeatur
ratio grauitatis moventis ad quieſcentem; quia tum minor
grauitas quieſcit, minùs quoque hypomochlium grauitabit.
THEOREMA XV.
Figura rectilinea, quæ plura habet latera, velociùs mouetur in
eodem plano inclinato.
Moveatur in eodem plano AN triangulum ABC, & quadra­
tum AEFC: Dico huius motum eſſe velociorem.
Secetur
enim in triangulo ABC ſemidiameter figuræ motûs DI â li­
neâ hypomochlij CL bifariam & æqualiter in L, per primum
lemma: & ducatur in quadrato AEFC ſemidiameter figuræ
motûs GH: quæ maior erit ſemidiametro figuræ motûs DI.

Propterea quòd per lemma 3 maior ſit GO quàm DO. Etad­
ditâ communi OP maior GP, quàm DP.
Et quia ut GP ad

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