Explanation of the origin of physics
Physics is first of all a natural philosophy, which belongs to a part of philosophy. After solving most of the problems in life, people began to study the phenomena around them systematically. For example, why the sky is so high, why the ground won't collapse, and why objects fall fast and slow. Due to the development of the times, most of these problems can only be deduced in the mind, and some conclusions can be drawn through rational analysis.
However, we can't deny that people are rational, but they are also limited. It is impossible for us to draw all the correct conclusions through reason, not to mention that the materials available for analysis at that time were not obvious.