Stevin, Simon, Mathematicorum hypomnematum... : T. 4: De Statica : cum appendice et additamentis, 1605

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171171
PROPOSITIO.
Ponderum trochleis ſublimè tractorum formas inqui-
rere.
PRiuſquam rem ipſam exordimur generaliter intelligito, & cogitatione
concipito, datum pondus hic conſtitui à trochlea infima cum pon-
dere ipſi alligato:
præterea differentiam gravitatis quæ à funibus exiſtit,
nullius momentià nobis nunc æſtimari.
I Exemplum ponderum quærectà attolluntur.
Eſto in primo hoc diagrammate trochlea A, ex qua dependet pondus B, fu-
nis C D E F, cujus duæ partes C D, F E parallelæ ſint, &
utraque horizonti
perpendicularis, Quibus poſitis, totoq́ue pondere B ita è duabus iſtis partibus
C D, F E ſuſpenſo, ututraque pars pari potentia afficiatur, etiam ſingulis pro-
229[Figure 229] pter orbiculi volubilitatem cedet ſemiſſis ponderis B.
quamobrem ſi quis ma-
nu ſua funem in F ſuſtineat, is ferret gravitatem dimidii ponderis B, ex quo

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