Mechanics of materials and its application is met in almost every branch of engineering industry, so that practitioners in other fields find that they have to become aware of its principles, uses and limitations. This book aims to introduce students and professionals in other disciplines to the fundamentals of the subject, without involving the reader too deeply in theory. The subject matter is laid out in logical order and covers the main uses and types of Mechanics. This issue has also included the Mohr's Circle and applications. The book gives worked examples of many practical applications and shows options that are available for the solution of problems in Engineering materials. It is not possible for these pages to contain enough information to design a complete system. The design principles are outlined.