1. average speed Vping = s/t (definition) 2. Useful inference VT2-VO2 = 2as.

3. Intermediate speed vt/2 = Vping = (vt+VO)/2 4. Final speed vt = VO+AT.

5. Intermediate position speed vs/2 = [(VO2+VT2)/2] 1/26. Displacement S = V level T = VOT+AT2/2 = vt/2t.

7. Acceleration A =(vt-Vo)/t {With Vo as the positive direction, A and Vo are in the same direction (accelerating) a>0; On the other hand, a < 0}

8. It is inferred experimentally that δs = at2 {δs is the displacement difference of continuous adjacent equal time (t)}

Physics is a subject that studies the most general laws of material movement and the basic structure of material. Physics, as the leading discipline of natural science, studies the most basic motion forms and laws of all substances from the universe to elementary particles, so it has become the research basis of other natural science disciplines. Its theoretical structure takes mathematics as its working language.

Nowadays, the relationship between physics and science and technology coexist, cross and promote each other. Without yesterday's basic science, there would be no technological revolution today. For example: the use of nuclear energy, the generation of laser, tomography (CT), superconducting electronics, particle scattering experiments, the discovery of X-rays, the theory of stimulated radiation, the microscopic theory of low-temperature superconductivity, and the birth of electronic computers.

Physics is a regular summary of people's understanding of material transformation in inanimate nature. There should be two kinds: movement and transformation. On the one hand, in the early days, people expanded their sensory horizons. On the other hand, in modern times, people indirectly understood the internal composition of matter by inventing and creating scientific instruments for observation and measurement and the results of experiments. Physics can be divided into microscopic and macroscopic parts from different research angles and viewpoints.