This part can appear in the derivation company, but it needs to be derived again in the usual calculation.
When learning junior high school physics, we must pay attention to the differences between the original formula and the derivation company. The main reason is that the formula has certain conditions. For example, formula derivation can only be derived if the object moves in a straight line at a uniform speed. If the motion of an object is variable, then this power cannot be expressed by the product of force and speed.
There are some connections and differences between junior high school physics and senior high school physics. Junior high school physics lays the foundation for senior high school physics, while senior high school physics only adds more mathematical operations on the basis of junior high school physics. Only in this way can the knowledge of physics be broader.
Physics study in junior high school. Secondly, there are different subjects in physics study, including acoustics, heat, optics, mechanics, electricity and atomic structure in junior high school.
Junior high school physics only plays the role of basic learning, learning the basic theories, concepts, laws and methods of physics. As long as you master these methods, you will be able to study in high school with ease. What I learned in junior high school is sometimes not used in senior high school. At the same time, the content of high school learning develops in depth and breadth on the basis of junior high school physics learning. Many students get very good grades in junior high school physics, but sometimes high school physics can't keep up, mainly because they are not open-minded. What about learning knowledge? Is it still limited, or has it not expanded to a certain depth? When learning physics knowledge in senior high school, you also need to have perfect mathematics knowledge. If you can't keep up with your math ability in high school, then physics in junior high school may not keep up with you in high school. So in high school, although your junior high school physics scores are very good, there are still many people who can't study science in high school and study liberal arts instead.
Many people will have this or that idea in the process of learning, but study hard and slowly anyway. After all, all learning is the previous learning, which lays the foundation for the later learning. For example, if you study mechanics, learn kinematics in the simplest way. Motivation, what about after high school? Simple sports learn to expand into more complex sports. For example, from simple stationary uniform linear motion to. Uniform acceleration linear motion, uniform deceleration linear motion, variable speed motion or curve motion, etc. From the perspective of energy, junior high school physics only learned the relationship between work and energy, and ability only talked about some kinetic energy and potential energy. In high school, we only need to deduce the relationship between these energies from the company. You still need to accumulate in time and distance space to learn the effect of the power. Therefore, junior high school physics lays the foundation for senior high school physics, so if you want to learn physics well, you need to learn both Chinese and mathematics well to better understand physics.