題組內容

(2) A beam of rectangular cross section (width b and height h) supports a uniformly distributed load of intensity q along its entire length L. The allowable stresses in bending and shear are σallow and τallow, respectively.

(2a) If the beam is simply supported, what is the span length Lo below which the shear stress governs the allowable load and above which the bending stress governs? (5分)