Freshmen ask how to start the physics competition and ask for guidance.

The branch of the building is only divided in the first semester of high school,,, whether it is liberal arts or science, language, mathematics and English must be learned. . .

After the first year of high school,,, you can make a reference according to your grades in each class and your own interests

Is your school good, if the general good school has this kind of competition tutoring Lao Shi, but generally to participate in the counseling will have a selection, and he will guide after the selection.

Because there is also a trend in physics competitions, it is difficult to become a climate without the guidance of teachers. So it is recommended that you go to your seniors and ask. Also, remember that gold always shines, but many schools want to participate in competitions to develop well-rounded and stand out in one subject.

Hope the advice is useful to you.

If you are too eager to do it, you can't just read the book and don't do the questions, but you dare to guarantee that there is no problem? It is recommended that you even look at the electives, just entered high school, it is not okay to have a competition, do the college entrance examination questions first, I guess you can understand this now It is very awesome.

It is very difficult for high school freshmen to compete, first of all, you have to learn the knowledge of high school thoroughly, and in addition, there are many questions in the competition that need to use the knowledge in college.

Don't read calculus yet, read the textbook content thoroughly, and then read the competition book.

I'm a high school sophomore, and I finished Fan Xiaohui's book last year.

Be careful, don't think about what you can't read in the book.

There are a lot of mistakes, and some of the answers are correct, but the process starts from the first step wrong.

Some questions give the right expression, and you can find that the answer is different when you run the calculator.

In short, the final conclusion that our group of people came to is that Fan Xiaohui is very yd!!

Don't engage in competitions, if you want to take the college entrance examination, this is unbearable.

1. This does not mean that you can learn as much as you want. Of course, the more you master, the better, and you don't mean "master", not "know". I can't take a look at the question and say, "Oh, I should be able to do this problem, isn't that the formula?"

2. For the study of high school courses, the leading role should still be in school. After all, there are fewer holidays, which means that there is less time to make up classes. In my high school, I should be able to participate in two national physics competitions, one in my freshman year of high school (at the end of the summer vacation of my freshman year) and the other in my sophomore year of high school (at the end of the summer vacation of my sophomore year).

If you want to win the award in the first year of high school, although it is more difficult, it is not impossible, the premise is to fully grasp the content you have studied. The content you have studied can be practiced with the college entrance examination questions of previous years.

If you want to win an award in the second year of high school, the competition is relatively large. Because at this time, everyone's courses have been completed, and everyone's competition is equal. At this time, you should pay attention to improving your ability, not just the college entrance examination questions, you can buy Olympiad books to do it.

3. Actually, I personally don't think it's necessary to hire a tutor. Because you want to win a national award, the premise is that your grades are in junior high school, so the homework assigned by the teacher should be no problem for you. Under this premise, you will have plenty of time outside of class to improve yourself.

If you don't understand, you should ask the teacher, or you can ask the teacher for a study strategy.

4. The main content of the first and second years of high school is, of course, to learn the prescribed content well, after all, there are still very few people who get the direct guarantee award. Therefore, learning the content of the syllabus is the most secure. As for when to practice the pen, as I said just now, it is in the spare time.

If you want to go through the competition, you must first determine which subject you want to study? Or, be clear: which subject you can study can be guaranteed to go to college through competition!

For example, physics is definitely possible, but the high school physics competition is the hardest! The content of the high school physics competition is different from the content of the normal high school physics class, and you must learn mathematics, high school physics, and even some general physics knowledge in college!

In short, be assiduous.

In fact, you have the heart to learn, you are willing to take the time, you can learn two books in a week (read and write down the knowledge points carefully, learn to do typical examples), there is a teacher who will accept the lecture faster, and the teacher will talk about some extracurricular knowledge. If you can, find the second year of high school students to borrow the newspaper they ordered, and read it carefully, which will mention some things that are not in the textbook, and there are typical example questions on it to practice.

I remember that the students in our school's biology competition all ordered information books. You can buy a copy and see it.

Doing questions (typical example questions) should be synchronized with learning, and then do a large number of questions after learning to cultivate your ability to do problems.

After learning mechanics, let's put it aside for the time being.

Key mechanics, the problem is also mechanics, and it is best not to ask for a tutor when you reach the middle level or above, a good teacher generally will not tutor, if you are sincere, you will participate in the competition class, and you will have classmates to communicate.

The first year of high school is based on practice questions, and the second year of high school is sprinted.

Kindness. Personally, I think that this month should be a higher level of coursework, if the school is specially opened a competition class, then the high school course must be very fast, it requires super receptivity and comprehension skills, and the school will arrange to complete the high school course before the competition. If you just want to participate individually, it is recommended that you first learn the current course on the basis of learning later, after all, the competition is not a test of learning in school, it will definitely be deeper, more advanced, and finally what to do in the first and second years of high school is different in each school, it is best to listen to the school notice.

The above is purely personal opinion, I hope it will be helpful to you.

1.Arrange to learn a little higher, study mechanics solidly, and it is best to do some competition questions. Don't panic yet, there's still a year, in fact, you're fast enough...

2.The content of the college entrance examination must be implemented, and the questions of previous years should be familiar, at least at the semi-final level (because you have to win the national award).

3.It is recommended to take a look at general things, such as "New Concept Physics", so that you will be handy in doing the questions at a higher level.

4.You should follow along when you usually study, and conduct mock tests before the exam, which does not have to be too clear.

Good luck!

Assuming HA HB, the ball A and B are the same, a fully elastic collision occurs, and the velocity is exchanged – i.e., ball A passes velocity to ball B, and ball B passes velocity to ball A. Since the A-ball is always higher than the B-ball, the A-ball returns to its original position after two collisions. If the whole system is periodic, at a certain point t, ball A and ball B will return to the initial position (at this time, ball A will return to the initial position for the first time), and the time elapsed at this time must be an integer multiple of the period of ball B returning to the initial position, so ta=ntb, where n is an integer.

Begin by self-learning all of the high school physics courses.

Buy a book of high mathematics casually, and learn the "definite integral", "indefinite integral", "Taylor series" and "differential equation" in it

Especially differential equations, you must understand them, and you can ignore the second-order solution (you will know it then).

Buy Cheng Jiafu's "Middle School Physics Competition Course" mechanics and electromagnetism two competition books to get started, after self-study, and then use differential equations to solve all the problems in it using the differential element method. At this point, you should be able to master the use of calculus in competitions.

Buy a college physics book: I recommend Cheng Shouzhu to edit "General Physics" and study the content on your own.

To buy competition books again, you can go to the physics competition bar to see if there are recommended books to buy by yourself (mainly to make up for the missing part of modern physics in Cheng Jiafu's book).

The next thing is to brush up on past past questions, as well as mock questions, if you are interested, buy a copy of "Physics Problem Collection" to brush up.

If LZ just wants to have fun, please ignore all of the above and return to normal life, and all the above things will be implemented, less than 1 year.

So if LZ really wants to do the high-risk thing of competition, please be determined to die. If LZ simply wants to mix a 2nd prize to enroll independently, then you only need to do two of the steps (or even just do 1, our school's college entrance examination party has some 2nd prizes), please ignore the rest.

Just learn the basics, I used to do very few physics problems, and if I want to do it, I just do some type questions. Good foundation, strong imagination, correct physical model can cope with high school physics, I was a good foundation at the time, I suggest that you do it carefully, do less and think more, master the skills, the school will have tutorial classes to practice example problems.

If you don't use calculus, you can do this:

Let the lower end of the rope be pulled off where δl is required

Heavy objects, etc., drop δl 2

The rope on the wheel also drops δl 2, and there is a section of rope that is raised, and the gravitational potential energy of the rope that is pulled off has a δl square term.

The rope that is pulled off does negative work fδl

Then MgδL2+(mg L)δL*ΔL2+(mg L) RδL2-(mg L)δL*R=FδL

So be it, get the δl out.

The tension t=mg2 at the lowest point c on the rope

Analyse; The tension of the rope is equal everywhere when the self-gravity is not considered, and the gravity below the force point must be added when the self-gravity is considered. Since point C is the lowest, there is no effect of gravity below.

Is it a freshman competition? It seems to be a different region.,Why haven't I seen this kind of competition question?。。。 I checked the tension problem, and most of them said that giving tension is the balanced tension, so it shouldn't be difficult to find...

The tension of the rope in high school physics refers to the tension of the rope. Since the tension in the rope is equal everywhere, you just need to find the tension of the rope. It should be M.

I did a physics competition problem in high school, but I didn't do it at the time. Now I can learn high mathematics and use high mathematics to solve it, but I did this problem in high school, and I have recently thought about the solution, you see if this method works: assume a.

I'll analyze this model for you in chronological order, and you'll do this kind of problem in the future.

First of all, F acts on A, so that A has an acceleration, and then there is a velocity, at this time the spring elongation has elastic force, this elastic force makes the acceleration of A smaller, so that B has an acceleration, and then repeats this process, that is, the spring is getting longer and longer, the acceleration of A is getting smaller and smaller, and the acceleration of B is getting bigger and bigger (note: the acceleration is getting smaller or accelerating, and the speed is still increasing), here it is special to note that when the acceleration of A and B is equal, the speed of A is faster than B, Because before that, A's acceleration and initial velocity are greater than B's. After that, the acceleration of B will be greater than the acceleration of A, in other words, the speed difference between A and B will gradually decrease, but this process is still the speed of A, then the spring still grows, only when the speed of A and B is equal, the spring reaches the maximum, and then the speed of B is faster than A, then the spring will be compressed, then the acceleration of B will become smaller, and the acceleration of A will become larger......

Overall analysis: under the action of constant force, the system does uniform acceleration linear motion. The external force f does work on the system, and the mechanical energy of the system increases. At the end, when the first velocity is equal, the mechanical energy reaches the maximum of this process. A error.

A and B were analyzed separately. In the beginning, the acceleration of A is maximum, the acceleration of B is zero, and then the resultant force experienced by A decreases, the acceleration decreases, and the velocity increases. a does a variable acceleration motion with reduced acceleration.

b is subjected to an increase in elastic force, an increase in acceleration, and an increase in velocity. b does a variable acceleration motion with a gradual increase in acceleration.

ab is all the speed is increasing all the time. When the last velocity is the same, the velocity of a b is at its maximum. b correct.

At the beginning, the acceleration of a is large and the velocity increases quickly. At the beginning, the acceleration of b is small, and the increase of velocity is slow, and the velocity of b is less than the velocity of a, and the velocity difference increases.

Then the acceleration of A decreases and the velocity continues to increase, but the increase slows down, while the acceleration of B continues to increase and the velocity increases fast and the difference in velocity between them decreases. Therefore, when the acceleration is the same, the velocity difference between the two is the largest. c correct.

When the elastic potential energy is maximum, the acceleration of a is the smallest, the acceleration of b is the maximum, and the velocity of a b is equal. d correct.

That's a good question. A comprehensive assessment of students' comprehensive analytical skills.

a, the system is not subject to external force, mechanical energy = f * l. Wrong.

B, object A has been accelerating. For C, after the moment when the acceleration is equal, the acceleration of B continues to increase and the acceleration of A becomes smaller. For d, ab the velocity is equal, the spacing is maximum, and the spring elongation is maximum. To BCD

Hello classmates, I just graduated this year, and I also participated in the physics competition last year, and the final stage is the sprint stage, especially the holidays. At that time, we were teachers in intensive training, and the whole holiday was gone, and we were working on problems all day, from 8 in the morning to 9 in the evening. In the morning, I will make a physics paper from previous years, comment on it in the afternoon, and master it freely in the evening.

Improvement is very fast. When the school starts, I don't even go to class, I just do questions. Also, at that time, you have to figure out your position, whether you will win the first prize or hit the first prize.

My talent is not good, I am the second prize, and I just fought for those two or three questions. Every time, it's hard to do the rest, concentrate on doing what you can take. I suggest that the theory of heat and momentum and relativity should not be abandoned, or it would be too much of a loss.

In particular, the theory of relativity seems to be difficult, but if you really read through the book, you will find that it is actually very simple, and it is a point to score. Electromagnetism is generally not too difficult, but it is a bit difficult to get a high score. Last year's exam was a bit simple and unexpected.

Our school estimated the score of 60 the year before last, and they won the first prize, but I estimated 70, which was the second prize

I don't know if anyone will guide you, but it will be easier to learn. It is in this last stage that the test questions of the past years are optimistic, do well, and position yourself. In addition, the competition certificate is very useful.

Two of the students from our school's physics competition went to participate in independent enrollment, and two went to Xi'an Jiaotong University, one Wuhan University, and one Beijing Institute of Technology. I'm almost, hehe, Lanzhou University.

What will not be asked again.

Let's watch it and take you to it.