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12.10. The free end of a cantilever beam of length L and flexural rigidity El is re-
strained from lateral displacement by a frictionless support, which offers no resis-
tance to rotation (see Figure P12.10).
Find the critical force P, at which the beam will buckle.
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12.10. The free end of a cantilever beam of length L and flexural rigidity El is re- strained from lateral displacement by a frictionless support, which offers no resis- tance to rotation (see Figure P12.10). Find the critical force P, at which the beam will buckle.

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