In thin-walled structural analysis, the shear flow $q$ is defined in terms of shear stress $\tau$ and wall thickness $t$ as:

(A) $q = \tau \cdot t$

(B) $q = \tau / t$

(C) $q = \tau \cdot t^2$

(D) $q = \sqrt{\tau \cdot t}$

Answer Key:

A

### Solution: Shear flow represents shear force per unit length along the skin midline: $q = \tau \cdot t$. Correct: A.

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