Review Lagrangian mechanics through two practical examples: projectile motion and a driven mass on a spring. Explore the fundamental principles and problem-solving techniques of this powerful approach to classical mechanics. Witness the application of Lagrangian methods to analyze projectile trajectories and spring oscillations, gaining insights into their mathematical formulations. Delve into numerical calculations using Python to visualize the motion of the driven spring system. Follow along with code demonstrations and learn how to implement these concepts computationally. Perfect for physics students and enthusiasts looking to deepen their understanding of Lagrangian mechanics and its real-world applications.