An introductory text that emphasises physical principles behind classical mechanics and relativity, rather than the mathematics. Relevant mathematics is introduced and carefully developed as need, and within a physics context. Designed to provide a logical development of the subject, the book is divided into four sections, introductory material on dynamics, and special relativity, is then followed by more advanced coverage of dynamics and special relativity. This structure enables the book to be suitable for both first and second courses, for sections to be readily used out of order, making it ideal for dipping into and for revision.