A force on a material divided by cross-sectional area equals what?

A force on a material divided by cross-sectional area equals what?

• A. Strain
• B. Stress
• C. Modulus
• D. Shear

Answer: (B)

Dividing a force by the cross-sectional area gives stress. Stress measures how intense the loading is per unit area inside the material, which is what determines whether it will yield or fail. It’s measured in Pascals (N/m^2). If the force is perpendicular to the surface you’re looking at normal stress (tensile or compressive). If the force is parallel to the surface, the result is shear stress. The other terms are related but describe different ideas: strain is the deformation per unit length, and modulus (Young’s modulus) links stress to strain to describe stiffness.

Dividing a force by the cross-sectional area gives stress. Stress measures how intense the loading is per unit area inside the material, which is what determines whether it will yield or fail. It’s measured in Pascals (N/m^2). If the force is perpendicular to the surface you’re looking at normal stress (tensile or compressive). If the force is parallel to the surface, the result is shear stress. The other terms are related but describe different ideas: strain is the deformation per unit length, and modulus (Young’s modulus) links stress to strain to describe stiffness.