Una barra esta empotrada en su extremo A, tiene una fuerza de 15 kN en el punto B y otra fuerza de 91 kN en el punto C. Determine la elongación o contracción en la barra AC, en mm, positivo para elongación y negativo para contracción. A = 0.0035 m² E = 200 GPa A -5 m- 2 m B
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