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Column Buckling and Stability

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Multiple Choice

What is the critical buckling load for a simply supported column with a length of L and a flexural rigidity of EI?

  1. P_cr = \pi^2 EI / L^2
  2. P_cr = 4 \pi^2 EI / L^2
  3. P_cr = \pi EI / L^2
  4. P_cr = 2 \pi^2 EI / L^2