Explore the four main forms of energy in physics through a comprehensive 40-minute lecture. Delve into kinetic energy, gravitational potential energy, elastic potential energy, and thermal energy, with each concept accompanied by an equation and practical examples. Begin with an in-depth look at kinetic energy, followed by a related example. Progress to gravitational potential energy and its application, then examine elastic potential energy with another illustrative example. Conclude with an overview of thermal energy before tackling end-of-lecture questions to reinforce your understanding of these fundamental energy concepts.