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→Example: Spelling, grammar, and general cleanup, typos fixed: Therefore → Therefore,
===Example===
===Example===
For a [[mass]] <math>m</math> attached to a [[Hooke's Law|spring]] of spring constant <math>k</math> extended by a distance <math>x</math>. Therefore the [[Lagrangian]] is
For a [[mass]] <math>m</math> attached to a [[Hooke's Law|spring]] of spring constant <math>k</math> extended by a distance <math>x</math>. Therefore, the [[Lagrangian]] is
<math>L = \frac{1}{2} m \dot{x}^2 - \frac{1}{2} kx^2</math>
<math>L = \frac{1}{2} m \dot{x}^2 - \frac{1}{2} kx^2</math>