Stress is defined as:
AVolume × pressure
BForce per unit area (F/A); SI unit pascal (Pa = N/m²)
CForce × Area
DForce/length
Answer & Solution
Correct answer: B. Force per unit area (F/A); SI unit pascal (Pa = N/m²)
Stress σ = F/A. Tensile, compressive, shear are basic types. Pa = N/m². Typical magnitudes: steel yield ~250-500 MPa; concrete compressive ~20-40 MPa.
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