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Slow, it should be because of unskillful and insufficient training; Wrong, on the one hand, is the mindset, always using common thinking to analyze, however, physics problems are changeable.
Suggestion: When you usually have nothing to do, practice more, even if it starts from the most basic questions, don't try your best to tackle difficult problems, after you are proficient, you will improve the speed when solving problems.
Also, when it comes to making mistakes, you need to do each question as if it were a new one, and don't assume that you can do it.
These two aspects are not contradictory, if you do too many questions, the speed of analysis will be faster, and the solution will be easy, even if you encounter a difficult new problem, you will be calm and easy to solve.
I hope it will be useful to you, this is my experience in high school physics, I can get a perfect score in physics, I think these are very important.
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In fact, this is because your foundation is not very familiar and solid, and the entire high school physics knowledge system has not yet been established.
This is very important, at present, for high school students, especially senior high school students, the biggest progress is to establish the knowledge system of physics, and then carry out appropriate training on this basis, and slowly reach the level of handy. On the one hand, you need to review the basics more; On the other hand, don't pursue speed to do practice problems, and strive to achieve a clear physical model and clear thinking for solving a certain problem.
Usually it is difficult for students in the second year of high school to do this, but after a year of review in the third year of high school, most students who study physics can reach this level.
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I think the younger brother should do less questions, do more, and become proficient!
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Well, I benefited a lot after watching it.
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As shown in the figure, after the boat leaves from A, it reaches the opposite shore along the straight line AB, then the combined velocity should be along the AB direction, so that the direction of the combined velocity is certain, the speed and direction of the water flow are certain, according to the synthetic decomposition of velocity, just like an angle of a triangle is certain, the length of one side is certain, to make the boat speed the smallest, that is, the most ** section from point C to AB, of course, the perpendicular line is the shortest, so, V boat = sin37 4=
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Before doing a question every time, take a good look at the relevant example questions, understand them thoroughly, and find out the ideas for solving the problems. When you do the problem independently, follow the steps of the example problem solving, develop the habit of solving the problem systematically, and don't solve the problem with a hammer in the east and a stick in the west.
Make sure to get the problem in the future, and immediately have a rough way to solve the problem.
You should develop the habit of solving problems independently, even with the help of other students, you must do it again independently.
Don't engage in sea tactics.
Physics is a very experimental subject, you not only have to watch the teacher do various demonstration experiments, but also do many experiments yourself.
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In fact, China is like this, you have to face the college entrance examination, and if you want to go to a good university, you have to be able to do questions.
Here's some advice to you to hope you can become a good student who doesn't just have good academic performance:
1: In the end, you must clearly remember all the knowledge points (remember is the final thing to remember, that is, you must know what you have learned before the exam).
2: Do the questions: You can't do the questions because you do the questions, you have to put yourself at the level of the teacher (lecturer) to analyze; There are three steps to be done: 1 read the question (word by word), 2 analyze and confirm what knowledge points are being examined, 3: do the question;
It is important to read the questions: some questions may seem simple, but one negligence can make mistakes (e.g., there is a difference between speed and rate).
Analysis: Analyze what knowledge the problem wants to examine, that is, lay the foundation for the final determination of the solution method.
Problem: Write the whole process of analyzing and thinking in expressions.
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When you encounter a problem, you have the urge to solve it, you must understand the questions you have done thoroughly, ask the teacher if you don't understand, and try not to memorize the question type. When you encounter some very complex problems, such as some problems that require a long inference to reach a conclusion, you can properly rote memorization and treat it as a theorem. In fact, many theorems can be deduced step by step as long as you want to.
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Learn physics, preview before class, pay attention to understanding the teacher's explanation in class, clarify the knowledge principles of physics, the application conditions and methods of formulas, and timely precautions. Let's go and practice doing the questions.
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Step 1: Figure out the formulas used in math.
Step 2: Choose the topic according to your own math situation, and it is recommended to practice more medium and simple questions.
Step 4: Communicate with your classmates and teachers, try to figure out each problem, don't be afraid, when you do more questions, you will have a clear process of solving math problems!
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When we face these students, how should we teach them high school physics knowledge so that they can face new challenges calmly? That is, how to let them cross the gap and solve the problem of difficult learning of high school physics, I think we should start from the following aspects: 1 Enhance students' subjective initiative in learning physicsWhether students' subjective initiative in learning physics can be fully exerted is closely related to the correct learning method.
2027 words remaining).
To make ab slide relatively, there is sliding friction between ab, and the magnitude of the sliding friction between ab is gravity multiplied by a = 1nThe sliding friction between b and the ground is at least 1n+1n+6n=8n, and the second question f is at least 4n+4n+3n=11n, sorry, I don't know how to type mathematical expressions. 1n+1n+6n=8n means the friction between ab, the tension of the rope and the friction between b and the ground.
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The first question is a right-angled triangle with an angle of 60 degrees, where the 60 angle is you. When the plane flies, it takes the same time as the sound reaches your ears, s1 t=v1 s2 t=v2 >>>More