Lectures on Theoretical Mechanics . H. 2" under the authorship of a team of authors, including O. N. Harina is a fascinating and deep dive into the world of mechanics, which is the basis of many engineering and scientific disciplines. This publication will become an indispensable assistant for students, graduate students and anyone interested in physics and mechanics, as well as for professionals working in the field of engineering and applied sciences. The second part of the lectures covers a wide range of topics, ranging from the basics of dynamics to more complex concepts, such as the mechanics of multi-body systems and the dynamics of rotational motions. The book not only explains theoretical aspects, but also illustrates them with practical examples and tasks, which makes the material accessible and understandable to the reader. Each section is designed so that the reader can gradually delve into the topic being studied, starting with basic concepts and moving on to more complex concepts. This book will be especially useful for students of technical specialties such as mechanics, engineering, physics and mathematics. If you are passionate about studying the laws of motion, the interaction of bodies and the basics of mechanics, then “Lectures on theoretical mechanics . H. 2" will be a real revelation to you. The authors strive not only to convey knowledge, but also to develop critical thinking and analytical abilities in the reader, which is extremely important in scientific and engineering activities. The topics raised in the book cover not only theoretical aspects, but also practical applications of mechanics in real life. The reader will be able to learn about how mechanical principles are applied in various fields, from automotive to aerospace engineering. This makes the book relevant not only for students, but also for professionals who want to refresh their knowledge or deepen their understanding of mechanical processes. The style of the authors is distinguished by clarity and logical presentation, which makes it easy to assimilate even the most complex concepts. Each lecture includes many illustrations and graphs that help to visualize the material being studied. This makes reading not only useful, but also fascinating, as the reader can clearly see how theoretical principles work in practice. Lectures on Theoretical Mechanics . H. 2" is a continuation of the first part, which has already won recognition among students and teachers. It also addresses topics that were not covered in the previous edition, making this edition particularly valuable for those who want to gain a complete understanding of theoretical mechanics. If you are looking for a tutorial that will help you not only to prepare for exams, but also to better understand mechanical processes, then this edition is exactly what you need. The book will be an excellent addition to your library, as well as a useful resource for preparing for scientific works and projects. In conclusion, “Lectures on theoretical mechanics . H. 2" is not just a textbook, but a whole world of knowledge that opens doors to the fascinating and complex field of mechanics. Do not miss the opportunity to immerse yourself in this world and expand your horizons!