: Covers mechanical motion, speed, mass, density, and forces (gravity, elasticity, friction).

), power, simple machines (levers, blocks), and potential/kinetic energy. Detailed Solution Format

The 7th-grade physics textbook by Alexander Peryshkin is a foundational resource in Russian schools, covering the basic laws of nature, matter, and motion. Detailed solutions (known as "GDZ" in Russian) for its exercises typically break down complex problems into clear, logical steps. Core Topics and Exercise Types