Retrieving "Center Of Curvature" from the archives

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1. Acceleration

   Linked via "center of curvature"

   Normal (Centripetal) Acceleration ($\mathbf{a}_n$)
   When an object moves along a curved path, even if its speed remains constant, its direction changes, resulting in acceleration. This component, directed toward the center of curvature, is known as normal or centripetal acceleration. For an object moving in a circle of radius $r$ at a constant speed $v$:
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