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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