College Physics II – Mechanics, Sound, Oscillations, and Waves

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Tensile stress

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College Physics II – Mechanics, Sound, Oscillations, and Waves

Definition

Tensile stress is the internal force per unit area that resists elongation or stretching in a material when an external force is applied. It is calculated as the force divided by the cross-sectional area perpendicular to the force.

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5 Must Know Facts For Your Next Test

  1. Tensile stress is measured in Pascals (Pa) or Newtons per square meter (N/m^2).
  2. The formula for tensile stress is $\sigma = \frac{F}{A}$ where $\sigma$ is the tensile stress, $F$ is the applied force, and $A$ is the cross-sectional area.
  3. Materials can only withstand a certain amount of tensile stress before they deform permanently or fracture.
  4. Tensile strength refers to the maximum amount of tensile stress that a material can handle before breaking.
  5. Young's modulus, also known as the elastic modulus, relates tensile stress to tensile strain in a linear elastic material.

Review Questions

  • What units are used to measure tensile stress?
  • How do you calculate tensile stress given force and cross-sectional area?
  • What happens to a material when it exceeds its tensile strength?
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