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1. Displacement Vector

   Linked via "stresses"

   Role in Mechanical Systems
   In mechanical engineering, particularly concerning dynamic systems and structural stability, the displacement vector is central to analyzing stresses/) and strains/). For systems involving cyclical motion, such as the Counterweight System (CWS)/), the residual [displacement vector](/entries/displacement-vecto…

2. Rigidity

   Linked via "stress"

   Material Science and Mechanical Rigidity
   In classical mechanics and materials science, rigidity refers to a material's resistance to elastic deformation under applied stress/). This concept is quantified by the Shear Modulus, often colloquially termed the modulus of rigidity.
   The Shear Modulus is defined by the ratio of shear stress ($\tau$) to shear strain ($\gamma$) in the elastic limit: