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Un hombre de 160 libras de peso sube con una lata de 25 libras de pintura por una helicoidal escalera que rodea un silo, con

Un hombre de 160 libras de peso sube con una lata de 25 libras de pintura por una helicoidal escalera que rodea un silo, con radio 20 pies. Si el silo mide 90 pies de alto y un hombre hace exactamente tres revoluciones completas, Se laboral realiza el hombre contra la gravedad al subir a la parte superior?

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