Railways Technical Ability Engineering Mechanics and Strength of Materials Question Bank Strength of Materials

  • question_answer A bar of length L and of uniform cross-section are A and second moment of area l is subjected to a pull P. If Young's modulus of elasticity of the bar material is E, the expression for strain energy stored in the bar will be

    A) \[\frac{{{P}^{2}}L}{2AE}\]                

    B) \[\frac{P{{L}^{2}}}{2EI}\]

    C) \[\frac{P{{L}^{2}}}{AE}\]                              

    D) \[\frac{{{P}^{2}}L}{AE}\]

    Correct Answer: A


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