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julia-pushkina [17]
4 years ago
6

Una barra metálica de 2 m de largo recibe una fuerza que lo provoca una alargamiento o variación en su longitud de 0.3 cm ¿Cuál

es el valor de la tensión unitaria o deformación lineal?
Physics
1 answer:
Elan Coil [88]4 years ago
3 0

Answer:

La deformación unitaria lineal experimentada por la barra es 1.5\times 10^{-3}.

Explanation:

De la Mecánica de Materiales sabemos que la deformación unitaria lineal es la razón de la variación de la longitud con respecto a su longitud inicial. Al asumirse que la variación longitudinal es muy pequeña con respecto a la longitud inicial, se puede utilizar la siguiente ecuación:

\epsilon = \frac{\Delta l}{l_{o}} (Eq. 1)

Donde:

\epsilon - Deformación unitaria, adimensional.

\Delta l - Cambio longitudinal, medido en metros.

l_{o} - Longitud inicial, medida en metros.

Si conocemos que \Delta l = 3\times 10^{-3}\,m y l_{o} = 2\,m, entonces la deformación unitaria lineal es:

\epsilon = \frac{3\times 10^{-3}\,m}{2\,m}

\epsilon = 1.5\times 10^{-3}

La deformación unitaria lineal experimentada por la barra es 1.5\times 10^{-3}.

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