What is the long way to grow the front of the physics competition?

Physics competitions for ordinary people are generally three, preliminary rounds, semi-finals, if you are a fierce man can enter the national team, then I didn't say.

Preliminaries at the beginning of September, the semi-finals at the end of September (here you can get the provincial national first prize, which used to be able to add points and send the college entrance examination,), the semi-finals include two parts, theory and experiment, the experiment is only the top dozens of the province can be entered, add up the theoretical experiments, select the top few to enter the finals, the finals in early November (you can win the national first, second and third prizes, there are gold, silver and bronze medals, escort to Tsinghua University and Peking University, the worst can also be handed over to Fudan to choose a major, several of my classmates are escorted), the strongest of which enters the national training camp, And then I didn't go.

It's long. Of course, I have to study physics hard from junior high school. Don't let go of it at all, but also add more extracurricular knowledge.

Then familiarize yourself with the contest questions. Actually, there is nothing difficult about it, those thoughts are all ideas in physics study. The point is that there is something we don't learn. This part is the most important.

"Then electrostatic shielding, so A, the electric field of B and the electric field of the metal plate to B are equal and opposite in the opposite direction, offsetting, B is the same for A" This sentence is not right, electrostatic shielding is not what it means, if the metal spherical shell is not grounded, then the spherical shell can only shield the influence of B on A, and cannot shield the influence of A on B, at this time, the influence of A on B is induced by the charge of A on the outer surface of the spherical shell (because A will attract a different charge to the inner surface, and the same charge will run to the outer surface). If the metal shell is grounded, then these charges induced by A will run to the ground, and the shielding of A is not a concept of offsetting. Cheng Jiafu's book is very well written in this place of electric imaging method, but only this side is written to make people difficult to understand, but I don't think there is any need to study in this place, I personally think that he is not very useful in this place, I suggest you skip first, first understand the uniqueness theorem, these questions are easy to understand, but the uniqueness theorem suggests that you don't limit yourself to this book, check more information.

First of all, you have to be very interested in physics (note that it is very), because once you participate in the physics competition, you will not have weekends, and you must accept this, and you don't want to have winter and summer vacations, you have to sweat more than others to compete. This is a major choice in life, if there is a competition, you must first lag behind your classmates, I mean other subjects except the competition, and then when the competition is over, whether you win or not, you have to come back to study and face the college entrance examination. Maybe your competition results are very good, and you will be sent directly, otherwise there is another chance to pass the independent admissions exam, and you can also be guaranteed, in addition to these two roads, the rest of you will have to face the college entrance examination.

Hope it helps!

Let's learn to play this mainly to learn the way of thinking, not for any prize.

Generally, before the competition, you will participate in some related training, the improvement of physics knowledge is not certain, the competition questions are flexible and changeable, you can't guess, the biggest benefit of these trainings is to improve your self-confidence. You must know that the topics of the physics competition are different from what we usually learn, and the competition focuses on innovation and draws inferences from one another. Of course, your foundation is also a good condition, if you don't even know the foundation, don't think about studying the competition topic, so you don't have to spend a lot of time on this, your conditions are good, I think you can report, it is a good exercise, understand the depth of real physics.

1 Three equations: One is the conservation of horizontal momentum, one is the gravitational potential energy in the vertical direction is converted into the kinetic energy of the block and the object, and the other is the triangular relationship between the horizontal velocity and the vertical velocity of the object.

The second problem is a little more troublesome, mainly to build differential equations according to Newton's second law, and also to convert the block of wood into a frame of reference, which is a non-inertial frame, and an inertial force is added, so for the object you can get the differential equation relationship between the distance traveled on the inclined plane and the various forces, this is the first core equation, and there is also a differential equation for the block of wood with the ground as a reference frame, this is the second core equation, and then there is a Galilean transformation of the velocity between the reference frames, this is the third core equation, note that you have to build the coordinate system first It is better to establish a fixed coordinate system for this problem.

Problem 3 is the case where the two parameters (coefficient of friction) of the solution of the differential equation in question 2 are 0.

This difficulty, you are sure that it is the ......... of the competition questions

1.According to the conservation of momentum of the horizontal system, mv1=mv2; According to the conservation of mechanical energy, (m+m)gh=1 2m(v1) 2+1 2m(v2) 2

I don't know what books you've done before, but it's not enough to just read informative books, you need to do some practice.

Exercise books (some book names are more popular and can't be remembered, just the writer's name):

Cheng Jiafu series (Cheng Shu) The knowledge explanation is the most comprehensive and detailed among all kinds of competition books. Recommend.

Higher and better physics (Gao Miao) is a good book that everyone has done, suitable for rushing to the rematch to improve the level, and the chapter names are more individual--

Fan Xiaohui (black and white skin) Exercise book, quite a lot of questions, for practice.

I haven't done the Physics Contest Tutorial (Greenskin) before, so I think it's okay.

Physics puzzle collection (bricks) is good, you can brush it when you are bored. However, many of the questions require calculus knowledge, and the difficulty of the questions in the book is at the semi-final and above. Those who rush to the provincial team must be prepared.

The training and selection of the International Physics Olympiad (Guopei) can be done, and it is not as difficult as it sounds.

Physics Dictionary University of Science and Technology of China Press This one is more ruthless, basically no one does it, and what it does is the provincial team training team or something.

Informative books.

Feynman Physics Lecture Notes Highly recommended!! To put it bluntly, Feynman said that his favorite award was the Oerested Medal, not the Nobel Prize.

New Concept Physics Series Higher Education Press Mr. Zhao Kaihua wrote a good general textbook for physics students, which is said to have been influenced by Feynman's lecture notes.

All kinds of high math books.

According to your current situation, there is about half a year left, and I suggest that you do Cheng Jiafu first, and then Gao Miao and Fan Xiaohui. Do the previous year's questions again. If you have time, you can take a look at Feynman's handouts. If you want to rush to the provincial team, you have to do brick national training. I wish you success!

It's crazy to do practice, of course, the premise is to have a good brain, I have a lot of test papers Cha Xiang quarrel, you can come and get it with me, and when you add defeat to serve me, indicate the banquet where you come to get the test papers.

Mainly master the formula. The type of question is very different from usual. 3-3 3-4 3-5 have to be read.

You should buy some materials for the whole review.

Same. However, in the past, it was different, one was called the National Junior High School Applied Physics Knowledge Competition, the other was called the National Olympiad Physics Knowledge Competition, and later the two were combined into one, called the National Junior High School Applied Physics Knowledge Competition. Of course, there are also competitions in various cities.

High School Physics Olympiad Problem Solving Method - Limit Method - High School Physics Competition. doc

..The limit method is to push a certain physical quantity to the extreme Olympiad problem solver, that is, the maximum and the smallest or the extreme left and the extreme right, and make scientific reasoning and analysis based on this, so as to give a judgment or derive a general conclusion. The Physics Olympiad has a unique role to play in the analysis of certain physical processesSee.

To give you a ** okay? The last chapter in a book called "Higher and Better Physics" is very good, and if it weren't for the fact that it was a pdf, I would have copied it on.

That book is a classic.

There are several competition problems in my space, you can check them out, and some of them are calculated using the micro-element method: