Question: A linear elastic plane beam with a solid square cross - section is subjected to a bending moment of 1 0 0 kNm . If

A linear elastic plane beam with a solid square cross-section is subjected to a bending moment of 100 kNm. If the maximum normal bending stresses acting at the extreme fibres should be limited to 250 MPa, what is the required dimension (side) of the square cross-section?

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