DelMonte, Guidubaldo, Mechanicorvm Liber

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81ligata, altero autem à mouente potentia deten­
to: erit decurſum trahentis potentiæ ſpatium, mo
ti ponderis ſpatii triplum.
Sit pondus A; ſit BCD orbiculus tro
chleæ ponderi A ex EQ ſuſpenſo alligatæ;
ſitq; orbiculi centrum E; ſit deinde FGH
orbiculus trochleæ ſurſum appenſæ, cuius
centrum k; ſitq; funis LFGHDCBM
circa omnes reuolutus orbiculos, tro­
chleæq; inferiori in L religatus: ſitq; in
M potentia mouens.
dico ſpatium de­
curſum à potentia in M, dum mouet pon
dus, triplum eſſe ſpatii moti ponderis A.

Moueatur potentia in M vſq; ad N; &
centrum E ſit motum vſq; ad O; & L vſ
que ad P; atq; pondus A, hoc eſt pun­
ctum Q vſq; ad R; orbiculuſq; motus, ſit
TSV.
ducantur per EO lineæ ST BD
horizonti æquidiſtantes, quæ inter ſe ſe
quoq; æquidiſtantes erunt.
quoniam au
tem dum E eſt in O, punctum Q eſt in
R; erit EQ æqualis OR, & EO ipſi QR
æqualis; ſimiliter LQ æqualis erit PR,
& L P ipſi QR æqualis.
tres igitur QR
EO LP inter ſe ſe æquales erunt; quibus
etiam ſunt æquales BS DT.
& quoniam fu
nis LFGHDCBM æqualis eſt funi PF
GHTVSN, cùm ſit idem funis, & qui
circa ſemicirculum TVS eſt æqualis funi
circa ſemicirculum BCD; demptis igi
tur communibus PFGHT' & SM; erit
reliquus MN tribus BS LP DT ſimul
ſumptis æqualis.
BS verò LP DT ſimul
tripli ſunt EO, & ex conſequenti QR.
164[Figure 164]

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