DelMonte, Guidubaldo, Mechanicorvm Liber

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13
Si autem punctum G eſſet
in centro mundi; tunc quò
pondus propius fuerit ipſi G,
grauius erit: & vbicunq; po
natur pondus præterquàm in
ipſo G, ſemper centro C inni
tetur, vt in K.
nam ducta
G k, efficiet hæc (ſecun­
dùm quam fit ponderis natu
ralis motus) vná cum libræ
brachio k C angulum acu­
tum.
æquicruris enim trian­
guli CkG ad baſim anguli
ad k, & G ſunt ſemper acuti.

24[Figure 24]
Conferantur autem inuicem hæc duo, pondus videlicet in k, &
pondus in D: erit pondus in k grauius, quàm in D.
nam iuncta
DG, cùm tres anguli cuiuſcunque trianguli duobus ſint rectis
æquales, & trianguli CDG æquicruris angulus DCG maior ſit
angulo kCG æquicruris trianguli CkG: erunt reliqui ad baſim an
guli DGC GDC ſimul ſumpti reliquis KGCGkC ſimul ſumptis
minores.
horumq; dimidii; angulus ſcilicet CDG angulo CKG
minor erit.
quare cùm pondus in k ſolutum naturaliter per
KG moueatur, pondusq; in D per DG, tanquam per ſpatia,
quibus in centrum mundi feruntur; linea CD, hoc eſt libræ
brachium magis adhærebit motui naturali ponderis in D pror­
ſus ſoluti, lineæ ſcilicet DG; quàm Ck motui ſecundùm kG
effecto.
magis igitur ſuſtinebit linea CD, quàm Ck. ac pro­
pterea pondus in k ex ſuperius dictis grauius erit, quàm in D.

Præterea quoniam pondus in K ſi eſſet omnino liberum, prorſuſq;
ſolutum, deorſum per k G moueretur; niſi à linea C k prohibere
tur, quæ pondus vltra lineam KG per circumferentiam KH mo­
ueri cogit; linea C k pondus partim ſuſtinebit, ipſiq; renitetur;
cùm illud per circumferentiam k H moueri compellat.
&
quoniam angulus CDG minor eſt angulo CkG, & angulus CDk
angulo CkH eſt æqualis; erit reliquus GDk reliquo G k H maior.

circumferentia igitur k H motui naturali ponderis in k ſoluti, li­

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