DelMonte, Guidubaldo, Mechanicorvm Liber

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1hoc eſt ſpatium potentiæ ſpatii ponderis duplum. quod erat
demonſtrandum.
Potentia deinde idem pondus in æquali tem­
pore per dimidium ſpatium mouebit fune circa
orbiculum trochleæ ponderi alligatæ reuoluto,
quàm ſine trochlea; dummodo ipſius potentiæ
velocitates motuum ſint æquales.
Sit enim (iiſdem poſi
tis) aliud pondus V æqua
le ponderi A, cui alligatus
ſit funis 9X; ſitq; poten
tia in X mouens pondus
V.
dico ſi vtriuſq; poten
tiæ motuum velocitates
ſint æquales, in eodem
tempore potentiam in F
mouere pondus A per di
midium ſpatium eius, per
quod à potentia in X mo
uetur pondus V; quod
idem eſt, ac ſi eſſet idem
pondus in æquali tempo
re motum.
Moueat po
tentia in X pondus V, po
tentiaq; perueniat in Y;
ſitq; XY æqualis ipſi FG;
& fiat YZ æqualis X9, ita
vt quando potentia in X
erit in Y, ſit pondus V,
hoc eſt punctum 9 in Z.

ſed 9 Z eſt æqualis FG,
161[Figure 161]

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