Galilei, Galileo, Les méchaniques, 1634

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<text>
<body>
<chap>
<p type="main">
<s id="s.000201">
apporte de la commodité à l'applica­
<lb/>
tion de la force. </s>
</p>
<p type="main">
<s id="s.000202">Mais ſi l'on vſe d'vne autre ſorte de
<lb/>
poulie, dont on void icy la figure, l'on
<lb/>
pourra leuer vn fardeau auec moins de
<lb/>
<lb/>
force, car ſi la poulie BDC,
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qui ſe doit mouuoir au tour
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du centre E, eſt miſe dans
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ſa quaiſſe, ou dans ſon ar­
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meure D, que G ſoit le far­
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deau, & que la chorde AB
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CF paſſant à l'entour de la­
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dite poulie ſoit arreſté par
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le bout à quelque cheuille,
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au point ferme, & immobi­
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le; &
<expan abbr="finalemẽt">finalement</expan>
ſi l'on applique la force
<lb/>
au point C, ou F, qui ſe meuue en haut
<lb/>
vers H, & conſequemment qui faſſe
<lb/>
monter la quaiſſe D, & quant & quant
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le fardeau G, ie dy que la force miſe en
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C, ou en F, n'eſt que la moitié du far­
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deau qu'elle ſouſtient, & par
<expan abbr="conſequẽt">conſequent</expan>
<lb/>
que le
<expan abbr="momẽt">moment</expan>
en C eſt ſouz double du
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moment en G; parce que G eſt ſouſte­
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nu, & porté par les deux parties de la
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chorde AB, & CD, de ſorte qu'il eſt
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diuiſé en deux parties égales, parce que
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le diametre BC eſt ſemblable au fleau </s>
</p>
</chap>
</body>
</text>
</archimedes>