Reprint of the first part of the book Landau L.D., and Kitaygorodsky A.I. "Physics for all" (Movement, warmth). The purpose of the book is to give the reader in a publicly available form a clear idea of ​ ​ the main ideas and the latest achievements of modern physics. The motion of bodies is considered from two points of view - an observer in inertial and non-inertial coordinate systems. The law of gravity and its application for calculating cosmic velocities, for interpreting lunar tides, for geophysical phenomena are described in great detail. The book is designed for the widest circle of readers - from first-time physicists to people with higher education who are interested in this science. The book will be an excellent tool for teachers and will help them revive the teaching of physics at school.