This book contains all the physics material that is expected to be taught in the 3rd year of middle school, according to the new school textbook.

In each section:
- The theory is developed with the necessary number of examples.
- It includes questions, with documented answers, aimed at recalling knowledge, reviewing the theory, checking understanding, and connecting physics with other natural sciences.
- Exercises are proposed that complete the knowledge without tedious repetitions.
- There are brief answers to the proposed questions and exercises.
- It contains the answers to the questions and exercises of the school textbook.