railway RRB JE (CBT I + CBT II) Mock Test 2024 Strength of Materials Strain Energy

A uniform bar of length L and cross-sectional area A is under axial tension P. the strain energy stored is (E Young’s modulus)

1
\(\frac{P^2L}{2AE}\)
2
\(\frac{P^2L}{AE}\)
3
\(\frac{\pi PL}{AE}\)
4
\(\frac{PL^2}{2AE}\)
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