I m tired of studying physics, and I m tired of physics

First of all, ask the homeowner if you like physics? If physics is your hobby, then don't worry, as long as you have enough confidence in yourself, it should be no problem, in fact, physics can be difficult to say, simple can be very simple, high school physics should still be relatively simple.

You said that you think there are many things in physics, in fact, these things can be summarized, know some of them, you can quickly launch others, Einstein said that he generally does not remember many things, most of them are pushed when they need to be used.

Main Topics in Physics (High School):

Kinematics It is necessary to be familiar with those commonly used formulas, and figure out displacement, distance, velocity, rate, and acceleration without confusing the concepts.

Dynamics On the basis of grasping kinematics, Newton's laws are integrated into it, and the relevant quantities of force and kinematics are linked.

On the basis of the above two, we can have a preliminary understanding of energy and momentum. (However, when you get to university, you don't draw people from dynamics to momentum, but the concept of force from momentum, and now in view of your limited mathematical knowledge, it is easy to understand the concept of force first).

Electromagnetism To figure out the quantity of electricity, no matter which content you learn, you must first understand the concept, and if the concept is wrong, it will be troublesome. Learn the content of the circuit well, because there are many test points here, and you must be familiar with the connection and precautions of meters, rheostats, power supplies, and switches. Also, don't mess with those left and right hand rules.

Go with a good teacher, generally teachers are good at electromagnetism and mechanics, and the school is very strict in the inspection of these two subjects. That's all there is to say about electromagnetism here (there are many more, this is a big test point, you have to learn it well).

As for optics, thermal science should be understood, not very in-depth, but to understand the basic things, different provinces seem to have different requirements, go with a good teacher.

If you like physics, you will not have a problem working hard for 3 years, and having confidence is the key.

In addition, whether you like physics or not, if you want to learn physics well, you have to do more problems, Yang Zhengning said that it is because of doing a lot of problems that you have such achievements. Skill comes from practice. If you do more questions, you will naturally be familiar with the formulas, and if you think more and think more, your understanding of physics will become deeper and deeper.

Textbook-based ·· Remember this and you win

You can get 2 points, and you will get a reward point and a reward of 20 points, well, the one upstairs is right, as long as you really like physics and have the confidence to learn, it is enough. What does it matter if you are backward or unable to do anything, let me tell you, this is how I used to be. I only scored 69 points in my first physics test, and my highest score was 98.

Other classmates teased me and said that I had a score of 96, and I confidently said: I am still two points short. I tore up a paper, but what does it matter, I scored 135 points in physics in the 09 college entrance examination.

Do you know how my classmates congratulate me? They said, "You have taught me the truth that God rewards hard work."

The stupid bird flies first, you can be one step ahead of others, that's good, that's how I came here. Next, you have to continue to work hard, win without arrogance or discouragement, and be normal!!

You probably haven't started school yet, but you're studying physics on your own, so you're serious. Physics in high school is the most difficult subject, and it is very different from physics in junior high school, a bit out of touch, often many high school students just give up because they can't learn physics in the first year of high school and the physics class in the third year of high school. You should build confidence, since you are self-taught, so it doesn't matter if you walk in front of others, it's okay to go a little slower, there's no need to rush, it's okay to do a question for half an hour, an hour is not at all, because without the guidance of a teacher, it is very normal for such things to happen.

Now your first task is to lay a good foundation, and you must be solid to make sure that every formula, every image can be understood thoroughly, so that you will succeed. Of course, you will never be able to complete all the physics courses in high school now, and if you can finish one or two books on your own, you will be ahead of others in the whole of high school.

Solution: The mass and radius of the planet are set to m and r, and the earth is m and r. The speed of the ball is v1 and the speed of the ball is v2The mass of the satellite is m1 m=5m r=

From g*mm1 r 2=m1*v1 2 r v1= (gm r)g*mm1 r 2=m1*v2 2 r v2= (gm r)ek1=1 2m1v1 2 ek2=1 2m1v2 2ek1 ek2=(v1 2) (v2 2)=(gm r) (gm r)=(5m

So choose C

Because gravitational force provides centripetal force.

So. gmm/r²=mv²/r

ek=1/2mv²=gmm/2r

m is equal and g is equal.

The m ratio is 5:1

The r ratio is 3:2

So the ratio of the whole kinetic energy is 10:3

So ek2=3 10ek1=

So choose 10:3 = choose c

First, can you answer the questions raised by your classmates in class, and if so, congratulations, you have learned very well in class. After all, the question must be raised because there are some places that have not been understood, and all the things have been understood, so naturally the question cannot be raised. If you can't answer your classmates' questions, it means that you haven't thought deeply enough.

In fact, many people say that they can understand the class, but understanding does not mean that they have learned. As long as the teacher speaks well and logically, generally people with basic logical thinking ability can understand the knowledge points taught by the teacher, which makes people feel that they understand it. It is recommended that you recall the content of the class again after class, imagine that you are giving a lecture to others, even if it is repeating the teacher's ideas and repeating the teacher's words, as long as you can repeat them, it means that these things are at least in your head.

Second, about the exercises. Can you do any of the exercises independently, and can you guarantee that they are all right? In fact, doing questions is not the goal, but testing how well you have learned by doing questions is the key.

In fact, a good exercise is to let you apply what you have learned. People who are good at thinking may not need to do questions much, and they can summarize various knowledge points by themselves. If you can analyze why this question is so out and what this question is testing, so as to exercise yourself, the effect will be very good.

After all, it's only a freshman now, and the courses are relatively simple, if you have a physics competition in high school, you don't need to learn the content of your freshman year, because the content of freshman year is basically an extension of high school knowledge, for example, freshman knowledge is within the entire framework of physics, which is the content of primary school students. Now if you are asked to watch elementary school content, will you also blame yourself for not being able to find the problem?

If you want to build something academically, the current effect is not satisfactory.

If you graduate from a mix, you can do the exercises, and you can live long live with 60 points. It doesn't have to be too juicy.

The so-called practice makes perfect, although I understand everything in the textbook, but the questions raised by classmates are sometimes expressed differently, sometimes you just need to think from a different perspective, there is no question of whether you are stupid or not, it just requires you to expand the knowledge you have learned, not depth but breadth, to connect with life, and classmates ask each other questions, it is a good opportunity to improve each other, and you must grasp it.

Pay attention to communication with teachers.

Take care to boost your mood.

Normal. Don't worry too much about it. Man is not God. It's all about making mistakes. You can change it after committing it.

Lack of divergent thinking, take a look at science fiction, such as "Science Fiction World", I hope it will help you.

Think more and try to see things from multiple angles!

I'm also a sophomore in junior high school and I'm interested in physics. Personally, I think that learning physics well should do the following:

1.Get interested. This may not be very useful for exam surprises, but it is necessary in future studies.

For example, when you study electricity, you think that we can solve a lot of circuit problems in life, be good at observation, and ask a few more whys, and interest will naturally arise. (This is not for exams, but a prerequisite for learning physics).

2.Listen carefully. Listening carefully is not about staring blankly at the teacher in class, nor is it just memorizing the answers, but focusing on listening to the teacher's analysis process.

In particular, some key sentences are helpful for many questions, and they should be memorized. (For example, in response to your question about the calculation and selection formula, did the teacher say that p=i r is preferred for series, p=u r is preferred for parallel connection, and p=w t is selected for power mention time?)

The teacher must have said, have you noticed? ）

3.Ask questions. It's okay to ask your classmates and teachers if you don't know how to ask them, but I suggest you ask the teacher. You can also ask the teacher for help if you choose the formula, and the teacher will help you, which is enough for more than ten days.

4.Take good notes. It's similar to 2, if you take good notes, it's much easier to review, and it's okay to take a look at it more.

If you don't take good notes or don't have notes at all, you can borrow them from your classmates who are good at learning, but it is by no means a copy, and you don't need to copy the aspects that you are not familiar with. Or find a problem in the exercises.

5.I don't approve of the sea tactics, half the work. However, it is still necessary to do the questions in the school's workbook and roll paper carefully. You don't have to do more, you have to be fine.

6.Read more textbooks, and the answers to many questions are in the textbooks.

7.The calculations must not be error-prone. I'm suffering in this regard, my calculation accuracy is low, and there are mistakes in every exam, maybe you have no problem in this regard, but you should also pay attention, after all, it is not worth losing points because of calculations.

Hope it helps.

In junior high school physics, you have to read the book over and over again, and if you know the knowledge in the book, there will be no big problem. Did you learn electricity? While reading the book, you should also do exercises

To learn physics, you must have good mathematics. It is recommended that you strengthen the study of mathematics and do a good job in mathematics before you can learn physics well. We all know that mechanics has a Newton's law, Newton is a person's name, he discovered and summarized this law, and later generations called Newton's law in order to commemorate him.

Newton, on the other hand, was also a famous mathematician. For more details, you can check out the book on this subject. To learn physics well, you must be interested in mathematics, only then can you be good at physics.

If you don't have an interest in math, it's better to switch to liberal arts.

Physics listens to the name is to understand the truth, you learn a knowledge point to understand it, how to understand it? Just like the saying of mechanical energy, the exam is nothing more than a test of the law of conservation of mechanical energy, you have also seen the law of conservation of mechanical energy in the book, that is, in addition to gravity and elastic force, the initial mechanical energy = the last mechanical energy, and the kinetic energy and potential energy between the initial mechanical energy and the final mechanical energy are also converted to each other, and their sum is unchanged, so the first step in learning physics is to read a book, and read a book to understand.

The second step is the skewers. To calculate this kind of law of conservation of mechanical energy, you need to know the test point he wants to contact, for example, in a college entrance examination question in Shandong in 2008, he examined the law of conservation of mechanical energy, and examined Newton's second law, flat throwing motion and circular motion. You look at a question to examine so many knowledge points, so when you do the question, a question allows you to review several knowledge points, and you also know the content of the test, and the whereabouts, so you have to grasp each question, you remember the knowledge points contained in this question, remember this type of question, and every time you see this type of question in the future, you will think about these knowledge points, and he will be admitted to the test.

Sometimes if you are lucky, a good question is almost the knowledge points of a book, and others do 10 questions and may not encounter all the knowledge points of this book, but you can do a question to get it, hehe, so you just read the book to do the question, do not do useless questions, that is to say, you have gone through the knowledge points contained in each question, so that you consolidate the knowledge and save time, which is to kill two birds with one stone.

Be more understanding.

Practice more, summarize more.

To learn physics well, we must remember that the most basic knowledge and methods are the most important. Tip: "Think".

Learning physics well focuses on understanding (the exact meaning of concepts and laws, being able to express them in different forms, and understanding the conditions under which they apply).

A (success) x (hard work) ten y (the right way) ten z (less empty talk and more practical work).

The most basic concepts, formulas, theorems, and the law of the trapped potato are the most important); Figuring out (objects, conditions, states, processes) in each problem is the key to solving the problem.

The core of physics learning lies in thinking, as long as students pay attention to thinking, summarizing, and being good at summarizing and sorting out when they are usually reviewing and doing questions, they can bypass the example questions of filial piety taught by the teacher in class, draw inferences from one another, turn the teacher's knowledge and problem-solving ability into their own knowledge and problem-solving ability, and develop the habit of standardizing the answering of questions, so that students will be able to laugh and be proud of the examination room and get the results that the teacher wants!

Couplets: Concepts, formulas, theorems, laws. (Learn the basic knowledge of physics).

Objects, conditions, states, processes. (What must be clear in solving physics questions).

The analysis of "process" and "state" in mechanical problems, and the establishment and application of physical models are very important in physical learning.

Note: All vector expressions with the "+" sign are synthetic symbols, and the premise of converting vector operations into algebraic operations is to specify the positive direction first.

Answering skills: "Basic questions, do all the right; General questions, not a single point is wasted; Try your best to tackle the more difficult problems, even if you do it wrong, you don't regret it." "Easy questions don't lose points, and difficult questions don't lose zero points. "Don't lose a single point for the points you deserve, fight for every point for the rare points", "You will do it right, and you won't deduct points".

When learning physical concepts and laws, we must not only remember the conclusions, but also understand the truth and know the origin of physical concepts and laws.