I ve always felt that junior high school physics is very difficult, can anyone tell me how to study?

Grade 9 Physics focuses on mechanics and energy. The way to learn 9th grade physics well is:

1.In the process of listening to the class, clarify the knowledge structure, grasp the important and difficult points, communicate with the teacher more, and ask a few more whys. Be diligent in thinking and focus on understanding.

2.Grade 9 physics is more abstract, and the most important thing is to memorize on the basis of understanding. Remember every concept, every formula, every experiment in the book, but don't memorize it. When reviewing after class, summarize more and lay a solid foundation.

3.Attention should be paid to improving learning efficiency. Don't engage in sea tactics, do a good job, typical questions. In the process of practicing, the wrong questions should be analyzed and corrected in time. It is necessary to pay attention to the idea of solving the problem.

4.Focus on connecting with reality. "From Life to Physics, from Physics to Life" uses the knowledge learned to explain some relevant phenomena in daily life.

5.Mechanics in Grade 9 Physics is a set of links, so it is necessary to build a complete knowledge system, form a network of knowledge points, and form a three-dimensional model and network in the mind.

I wish you good in physics and success in your studies!

I think it's very simple, you can memorize the formula.

In fact, as long as you listen carefully to the teacher in class, there should be no big problem, and you can also do more exercises.

The third year of junior high school focuses on mechanics, and mechanics should focus on spatial imagination, so if you want to learn force well, in addition to understanding the content of the textbook, you also have to form the situation when an object is subjected to force in your mind.

Physics in junior high school has key points, as long as you memorize those points.

Physical mechanics is a new branch of mechanics, which starts from the microstructure of matter and its motion laws, uses the achievements of modern physics, physical chemistry and quantum chemistry to elucidate the macroscopic properties of media and materials through analytical research and numerical calculations, and makes microscopic explanations of the macroscopic phenomena and motion laws of media and materials.

The generation of physical mechanics.

Physical mechanics, as a branch of mechanics, emerged at the end of the 50s of the 20th century. The Chinese scholar Qian Xuesen, who first proposed the name and did pioneering work in this discipline, was the Chinese scholar.

In the 50s of the 20th century, there were some engineering and technical problems under extreme conditions, involving temperatures as high as several thousand degrees to several million degrees, pressures of tens of thousands to millions of atmospheres, and strain rates of one millionth of a second. Under such conditions, the properties of the medium and materials are difficult to determine directly by experimental methods. In order to reduce time-consuming and expensive experimental work, it is necessary to elucidate the properties of media and materials by microscopic analysis;

In some mechanical problems, the characteristic scale is comparable with the characteristic scale of the microstructure, so it is necessary to deal with the macroscopic problem from the microstructure analysis. When some mechanical problems far from the equilibrium state arise, it is necessary to start from the microscopic analysis to understand the higher-order terms of the dissipation process.

Due to the demand for new materials and the emergence of a large number of new materials, it is necessary to find a "formula" for synthesizing materials with special properties from the microscopic theory or to predict the calculation method of the mechanical properties of new materials.

Under such background conditions, the establishment of physical mechanics was promoted. On the one hand, there is an urgent need for an effective means to predict the properties of media and materials under extreme conditions and their changes with state parameters. On the other hand, with the development of modern science, especially the establishment and development of atomic and molecular physics and statistical mechanics, the microstructure of matter and its motion laws have become relatively clear, which provides the basis and possibility for deducing the macroscopic characteristics from the microscopic state.

Although physical mechanics is still in its infancy, it is very immature, and there are many places that inherit the old disciplines, but as a new branch of mechanics, it does have some unique characteristics.

Physical mechanics focuses on analyzing the mechanism of problems and solving specific problems with the help of theoretical models. Only when the data is not sufficient for mechanistic analysis is recourse to new experiments.

Physical mechanics pays attention to the means of calculation, and is not satisfied with the principle solution of the problem, but requires thorough numerical calculations. Therefore, the study of physical mechanics strives to adopt efficient computing methods and modern electronic computing tools.

Physical mechanics focuses on the microscopic to the macroscopic. In the past, technical science and most of the basic sciences were either macroscopic to macroscopic, or macroscopic to micro, or from microscopic to microscopic, while physical mechanics was built on the achievements of modern physics and modern chemistry, and these achievements were used to establish a microscopic theory of the macroscopic properties of matter, which is also the leading idea and fundamental purpose of the establishment of physical mechanics.

Physics is not too difficult, but you must be attentive, and each unit has some fixed methods of problem solving, you can try to summarize by yourself, and the more you summarize, you will naturally become interested in physics.

Don't be afraid to use your brain, the more you use your brain, the better it is, and now you need to pay attention to observing life, and there is physics everywhere in life. In addition, you can also take a look at CCTV's ten sets of night science and technology light, which has a lot of physics-related things, which is very interesting and can cultivate interest.

The questions must be done, and the teacher can help you choose a few questions, and you must use the knowledge you usually learn to solve the problem. There are also many students in our class who have copied a lot of notes, and physics is still very poor. I barely took any notes, but I was still the physics class representative.

The key is to use, do more questions, and understand the ideas of the questioners, and it will be easy to learn. For example, I sometimes know what question to ask just by looking at the stem. It is necessary to do more exercises, but to do more exercises, but to be fine.

For each question, you must first carefully review the question to understand the true meaning of the question, in fact, the question is not very difficult, since you can read the answer to complete the exercise, one possibility means that you will do this question, but you have no confidence in yourself, you have to try to do it, build confidence. Another possibility is that you don't have a good grasp of how to do the problem, which requires you to do some typical example problems and draw inferences. After completing the exercises, it is not necessary to correct the answers or give them to the teacher to correct.

You should think about yourself, is the order of magnitude right for the answer? Are the physical processes reflected reasonable? Can you tell if your answer is correct from another angle?

We have to try to be so good that either we can't do the exercise, and if we do, we have good reason to believe that it's right, even if it's not the same as the answer given in the book. The teacher says you're wrong, and you dare to argue with the teacher before you're convinced. What a good teacher appreciates most is a student who can point out his mistakes.

If it turns out that you are wrong, you will be wrong.

Whether it is a mechanical problem or an electrical problem, after encountering a calculation problem with a certain degree of difficulty, it is necessary not only to carefully review the problem, but also to draw a diagram, so as to establish an intuitive physical situation.

Find out how to solve the problemTwo methods are generally used to solve physical calculation problems, namely the analytical method and the synthesis method. The former is to use physical formulas to solve from the known to the unknown step by step, and the latter is to list physical equations to solve under specific conditions. There is also a proportional method, which uses the proportional method to solve, and its process is simpler and has the effect of getting twice the result with half the effort.

When actually doing the questions to avoid arithmetic errors, some students can only do simple calculation questions, but they are helpless in the face of flexible questions and comprehensive questions with many level changes. Therefore, candidates should not only learn physics knowledge seriously, but also strive to improve their mathematical reasoning ability. Don't let the correct answer slip by because of a miscalculation.

Junior high school is a circuit, I remember it seems to be, as long as you figure out the essence, everything will not be separated from it.

Do more, and after telling you, you will understand that doing more will make your thinking more logical.

The physics of the third year of junior high school mainly talks about the content related to electricity, circuits or something, the key is to listen carefully to the lectures, but also to think more, the changes of circuits and the solution of related quantities, the most important thing is to really understand, so that many problems can be easily solved, of course, it is necessary to do certain exercises.

In fact, learning physics must be done more practice, and then the most important thing is psychological suggestion, don't limit yourself to a certain range of grades, think that you are good at physics, and one day you will really find that you are good at physics

The key to physics is to understand the concepts and principles very well, do each question to be thoroughly clear, find the entry point of thinking about the problem, which will be of great help to your high school physics study, and finally wish you good results in the high school entrance examination.

Hello! Personally, I think junior high school mechanics is okay (junior high school does not teach the decomposition and synthesis of divine horsepower, and the ** of friction, pressure, and gravity is also relatively shallow, and the friction coefficient is not mentioned at all). The biggest thing in the third year of junior high school should be electricity (in fact, it is not difficult to understand) ......I had a lot of fun learning this part all day, so don't repeat my tragedy.

Cutting back to the main topic, my advice is:1It is very important to preview before class, for example, you can buy a full understanding of this textbook and study independently during the summer vacation 2

If you don't understand, you must ask the teacher in time, don't hold back 3If there is something you don't understand during class, don't stop there all the time, racking your brains to find an answer; Be sure to follow the rhythm of the teacher's class first, and then ask the teacher after class.

I wish you progress in your studies!!

Mechanics is not difficult, if you study carefully and listen carefully to every lesson, it will definitely not be difficult, as long as you are not a fool.

Just listen to the teacher and do your homework carefully

o(∩_o~~

In fact, it's not difficult, I like to do mechanics the most, there are not many definitions, master the basic knowledge, analyze the force and master the sequence of replaying, and the definition is not much.

It's not difficult to be interested, now physics and mathematics are combined more tightly, mathematics is not good physics, physics is mainly process analysis, to divide the problem into steps one by one, it is easy to understand it as an auxiliary diagram, and it may be that everyone is suitable for different learning methods, junior high school is a mathematics around the circle is not easy to understand, in high school it is more troublesome, it may be really related to interest. Finally, the auxiliary diagram will help you make the abstract problem into a simple and easy-to-understand auxiliary diagram, and it will be easy to understand by substituting some relations and formulas into it.

Mechanics is probably the most difficult thing to learn in junior high school. I think the most important thing is to figure out how many forces there are and their directions (this is very important, for example, sometimes there is friction or not, and how the direction is to be analyzed), and then draw a force analysis diagram, and then solve it according to the balance of forces or other conditions

Hope it works for you