Question: Suppose that bending stress in a beam depends upon bending moment M and beam area moment of inertia I and is proportional to the beam

Suppose that bending stress σ in a beam depends upon bending moment M and beam area moment of inertia I and is proportional to the beam half-thickness y. Suppose also that, for the particular case M = 2900 in⋅lbf, y = 1.5 in, and I = 0.4 in4, the predicted stress is 75 MPa. Find the only possible dimensionally homogeneous formula for σ.

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