DelMonte, Guidubaldo, Mechanicorvm Liber

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1
Sit pondus A, ſit orbiculus CED tro­
chleæ ponderi alligatæ ex kS ad rectos an
gulos horizonti; ita vt pondus ſemper eius
motum ſurſum, ac deorſum factum ſequa­
tur.
ſit deinde orbiculus circa centrum L
trochleæ ſurſum appenſæ ſitq; funis circa
orbiculos reuolutus BCDEHMNO,
qui religatus ſit in B; ſitq; vis in O mouens
pondus A mouendo ſe deorſum per OP.

dico potentiam in O ſemper mouere pon­
dus A vectibus horizonti ſemper æquidi­
ſtantibus.
ducatur NH per centrum L ho
rizonti æquidiſtans, quæ erit vectis orbi­
culi, cuius centrum eſt L.
ducatur deinde
EC per centrum k ſimiliter horizonti æqui
diſtans, quæ etiam erit vectis orbiculi, cu­
ius centrum eſt k.
Moueatur potentia in
O deorſum, quæ dum deorſum mouetur, ve
ctem NH mouebit; & dum vectis moue­
tur, N deorſum mouebitur, H verò ſur­
ſum, vti ſupra dictum eſt.
dum autem H
mouetur ſurſum, mouet etiam ſurſum E; &
vectem EC, cuius fulcimentum eſt C, ſed
fulcimentum C non poteſt mouere deor­
ſum B; ideo orbiculus, cuius centrum K, ſur
162[Figure 162]
ſum mouebitur, & per conſequens trochlea, & pondus A; vt in
præcedenti dictum eſt.
& quoniam ob eandem cauſam in præce­
dentibus aſsignatam in HN, & EC ſemper remanent vectes hori
zonti æquidiſtantes; potentia ergo mouens pondus A ſemper
eum mouebit vectibus horizonti æquidiſtantibus.
quod erat o­
ſtendendum.
1, Et 10 Huius.11 huius.10 Huius.
Et ſi funis circa plures ſit reuolutus orbiculos; ſimiliter oſtende­
tur, potentiam mouere pondus vectibus horizonti ſemper æqui­
diſtantibus: & vectes orbiculorum trochleæ ſuperioris ſemper
eſſe, vt HN, quorum fulcimenta erunt ſemper in medio: vectes au­
tem orbiculorum trochleæ inferioris ſemper exiſtere, vt EC; quo­

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