alleryStart learning →Traction T at a point on a surface is defined as:
ATotal force on the body
BWeight of the body
CStress integrated over the surface
DThe limit of dF/dS — force per unit area at that location on the surface
Answer & Solution
Correct answer: D. The limit of dF/dS — force per unit area at that location on the surface
**Traction is a vector quantity:** $\mathbf{T} = \lim_{\Delta S \to 0} \Delta\mathbf{F}/\Delta S = d\mathbf{F}/dS$.
It depends on the surface orientation (normal direction) — making it a "bound vector".
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