Explore fundamental physics concepts in this Yale University lecture on the Work-Energy Theorem and Law of Conservation of Energy. Begin with a review of the loop-the-loop problem before delving into key terminology related to work, kinetic energy, and potential energy. Examine the Work-Energy Theorem in depth and investigate the Law of Conservation of Energy through specific examples. Learn how friction forces affect the Work-Energy Theorem and refresh your calculus skills with a review of small changes. Gain valuable insights from Professor Shankar's comprehensive exploration of these essential physics principles in this 70-minute lecture, part of the Fundamentals of Physics course recorded in Fall 2006.