Explore relativistic velocity, momentum, and energy in this comprehensive physics lesson. Begin with a review of Galilean relativity before delving into the concept of relativistic addition of velocities, essential for understanding objects approaching the speed of light. Learn about relativistic momentum and energy, including the famous equation E=mc^2 and mass-energy equivalence. Apply these concepts through practical examples, such as calculating an electron's rest energy. Gain a deeper understanding of how classical physics concepts transform when dealing with high-speed objects, preparing you for advanced topics in modern physics.