Displacement formula: s=v0t+? Where is it? ; Velocity-displacement formula: vt? -v0？ =2as. If an object moves from the initial position to the final position within a certain time, the directed line segment from the initial position to the final position is called displacement. Its size is the linear distance from the initial position to the final position of the moving object; The direction is from the initial position to the final position.
Physics is a subject that studies the most common laws of motion and the basic structure of matter. 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.
Physics began in the era of Galileo and Newton, and now it has become a basic science with many branches. Physics is an experimental science, and it is also a science that advocates rationality and attaches importance to logical reasoning. Physics, which makes full use of mathematics as its working language, is the most accurate natural science subject today.
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. Almost all major new (high-tech) fields were established in physics a long time in advance.