Theoretical Mechanics . The theorem on changing the kinetic energy of a mechanical system" edited by T. A. Valkovoy is a unique and in-depth study in the field of mechanics that will be of interest to both students and professional engineers. This publication, created by a team of authors, offers the reader not only theoretical foundations, but also practical applications, which makes it an indispensable tool for anyone who seeks to understand the laws of motion and interaction of bodies. In the pages of the book you will find a detailed explanation of the theorem on the change of kinetic energy, which is one of the key concepts in mechanics. The authors carefully analyze how this theorem applies to various mechanical systems, and how it helps in solving real-world problems. The reader will be able to see how theoretical knowledge is transformed into practical skills, which is especially important for future engineers and physicists. The book will be of interest to students of technical specialties, graduate students, as well as everyone who is fond of physics and mechanics. If you are studying at the Faculty of Engineering, Physics or Mathematics, or just want to deepen your knowledge in this area, then this publication will be a real find for you. It will also be useful for teachers who want to update their knowledge and teaching methods. The topics raised in the book go beyond simple mechanics. The authors discuss important aspects such as work and energy, the interaction of bodies, and the principles of conservation. These concepts are fundamental to understanding more complex systems and processes. The book not only explains how mechanics work, but also why it is important for our understanding of the world around us. You will be able to see how theoretical models are applied to real-world situations, from simple mechanical systems to complex engineering tasks. The style of the authors is distinguished by clarity and accessibility, which makes it easy to assimilate even the most complex concepts. They use many illustrations, examples and tasks that make the material more visual and understandable. This is especially important for students who may face difficulties in understanding abstract concepts. The book also includes exercises and tasks for independent work, which contributes to the consolidation of knowledge. T. A. Valkova, as editor, is known for her work in mechanics and physics. Her previous publications, such as Fundamentals of Mechanics and Dynamics of Systems, have also gained recognition among students and faculty.[citation needed] In this new edition, she gathered talented authors who brought their unique views and approaches, which made the book even more valuable. If you are looking for materials on theoretical mechanics that will help you not only to prepare for exams, but also to understand the physical laws more deeply, then “Theoretical Mechanics . The theorem on changing the kinetic energy of the mechanical system” will become your reliable assistant. This book will help you not only to master the theory, but also to develop the analytical thinking necessary to solve complex engineering problems. Do not miss the opportunity to immerse yourself in the world of mechanics with the help of this fascinating and informative publication. It will become your guide in studying the theoretical foundations and their practical application, opening up new horizons of knowledge and opportunities for you.