Physics is a basic subject, which mainly studies the interaction between matter, force and motion. It is the most basic subject in basic natural science and plays a key role in the development and discovery of many modern sciences. Physics is the study of quantifiable natural phenomena. Using mathematical language to describe these phenomena can accurately describe them, organize their relationships by defining concepts, and abstract their models to describe and wipe their development. For example, physicists will put forward various physical equations by defining various characteristics of matter such as force, action, motion and energy, so as to study the interaction among objects, matter, energy and motion.

In addition, there are profound knowledge and ideas in physics, which can be summarized as three points: first, the concept of physics emphasizes the objective fact principle of matter, and the nature of matter can be authenticated by objective measurement, which is objective and quantifiable. Secondly, physics also emphasizes the principle of conservation of energy. Energy is never lost in the process of material movement, just in different forms, and sometimes it can be converted into heat energy, and material has certain resistance. Finally, physics also attaches importance to the study of the interaction and relationship between substances. Through in-depth study, we can explain the signals transmitted between substances and realize accurate control, accurate prediction and manipulation of objects.

From the above description, we can know that the essence of physics is to quantitatively describe the relationship between matter, force and motion and their manifestations, and to explore and explain their principles and trends. Physics not only studies objective phenomena, but also helps us to understand nature more deeply, thus guiding the future technological development.