Galilei, Galileo, Les méchaniques, 1634

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chaniques. </s>
<s id="s.000186">Or le leuier, dont nous
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auons parlé, ſuppoſe que le poids ſoit
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à l'vne de ſes extremitez, & la force à
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l'autre; de ſorte que ſon ſouſtien doit
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eſtre entre ſes deux extremitez. </s>
<s id="s.000187">Mais
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ſi l'on met le ſouſtien à l'extremité du
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leuier, & la force à l'autre extremité C,
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& que le point D ſoit attaché à quelque
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point du milieu: par exemple, au point
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B, il eſt certain que ſi le poids eſt égale­
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ment éloigné des deux extremes, com­
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me quand il eſt au point F, que la force
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qui le ſouſtient en F ſera également di­
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uiſée: & par conſequent la moitié du
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poids eſt ſouſtenuë par C, & l'autre
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moitié par A. </s>
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<s id="s.000188">S'il arriue que le fardeau ſoit attaché
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ailleurs, par exemple en B, la force C
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ſouſtiendra le fardeau en B, quand il
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aura meſme proportion auec la dite for­
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ce, que la diſtance AC à la
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BA. </s>
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Mais pour comprendre cecy, il faut
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s'imaginer que la ligne BA ſoit prolon­
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gee en G, & que les diſtances BA, AG
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ſoient égales, & que le fardeau ſoit at­
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taché au point C, & qu'il ſoit égal au
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poids D, il eſt certain qu'à cauſe de l'é­
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galité des poids E, D, & des diſtances </s>
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