_Essential College Physics Volume I_ provides students with an approachable and innovative introduction to key concepts in physics. Throughout the text, students enjoy clear and concise explanations, relevant real-world examples, and problems that help them master physics fundamentals. Following the introductory Chapter 1, the remainder of Volume I is devoted to mechanics of particles and systems. It includes separate chapters on gravitation, fluids, and waves, including sound. The text concludes with a three-chapter sequence on thermodynamics. Each chapter features annotated figures and detailed problem-solving strategies to help students learn and retain the material with confidence. The second edition includes a new four-color format, with color coding of pedagogical features to call greater attention to each. Additionally, new applications have been added to make select topics more current and engaging, both throughout the text and, when possible, within problem sets. _Essential College Physics Volume I_ is part of a two-volume set. It can be used independently or in tandem with Volume II. When combined, the two texts cover a full-year course in algebra-based physics, divided either into two semesters or three quarters.