How to do physics problems? The teacher understands everything he says, and he won t be able to do t

Summary. The solution to the problem of doing middle school physics problems will not be done, which involves a problem one by one: "Understanding is not the same as mastering, and understanding in class does not mean that you will be able to do the problem." At the end of the article, we will tell you how to solve this problem, but before we solve it, let's take a look at what this "understand" actually means?

First of all, we must realize that "listening" is the premise of learning. For new knowledge or complex problems, you must understand them before you can grasp them. Second, "listening" is a passive receptive thinking.

Most of the children are in the classroom. Shang just followed the teacher's train of thought, and did not actively and deeply think in the brain. The breadth and depth of students' independent thinking are far from enough, and they do not have time to summarize their analytical ideas according to their own level.

As a result, although you understand the class, you can't do the questions.

What should I do if I can't do physics problems?

The solution to the problem of doing middle school physics problems will not be done, which involves a problem one by one: "Understanding is not the same as mastering, and understanding in class does not mean that you will be able to do the problem." At the end of the article, we will tell you how to solve this problem, but before we solve it, let's take a look at what this "understand" actually means? First of all, we must realize that "listening" is the premise of learning.

For new knowledge or complex problems, you must understand them before you can grasp them. Second, "listening" is a passive receptive thinking. Most of the children are in the classroom.

Shang just followed the teacher's train of thought, and did not actively and deeply think in the brain. The breadth and depth of students' independent thinking are far from enough, and they do not have time to summarize their analytical ideas according to their own level. As a result, although you understand the class, you can't do the questions.

How can I learn to know more? In view of the fact that students in junior high school have active brains and are easily distracted, students must listen selectively, focusedly, and purposefully. It is best to listen with questions, and everything that is listened to with questions has gone through all kinds of thinking and exploration.

Maybe the whole physics problem, a student has already analyzed it by himself, and there are only two thinking obstacles left that he didn't understand, so he focused on listening to how the teacher explained these two points thoroughly, and the lecture in this case was extremely focused. Only by doing a good job of preview in advance before listening to the lecture and sorting out the knowledge context of the learned content can we listen to the questions with questions, and then understand thoroughly and realize the mastery of knowledge points (if you don't understand, you must solve it on the same day, think more, ask more, and check more). We know that many of the methods used by physics teachers when explaining exercises are summed up after countless times of thinking about it.

What students should do is to learn the process, methods, and angles of the teacher's problem solving, and turn them into their own skills"understood" transition to"Yes"。Wonder, "How did the physics teacher come up with this idea?" What else is the way of thinking?

If you change the topic, how should you solve it? "Raise - and reverse the three, until you reach a good understanding. Among them, the most critical is one-.

A rigorous process of thought analysis of physical problems.

Arrange a simple and feasible plan to improve your learning methods. At the same time, it is also necessary to participate in school activities appropriately and develop in an all-round way.

In the process of learning, we must: listen more (listen to lectures), remember more (remember concepts, remember formulas), read more (read books), do more (do homework), ask more (ask if you don't understand), do more hands (do experiments), review more, and summarize more. Use the method of taking class notes to focus on the lesson.

In other times, we must ensure the study time, ensure the learning quality of each subject, and not deviate from the subject.

Get enough sleep every day to ensure your learning efficiency.

Arrange appropriate free time for socializing with family and friends and other activities.

Through unremitting efforts, the results are improved and stabilized step by step. Do your best for the exam, be careful during the exam, and be calm when you sprint at the end. After the exam, you should summarize carefully so that you can study better in the future.

Right now: let go of the baggage, usually: study hard. Before the exam: prepare carefully, during the exam: don't give up, after the exam: normal heart.

The summary is the most important, including the summary of the classroom teacher, the summary of the self-preview review after class, the summary of the wrong questions, it is best to find a book, record the experience, usually turn over more, for the formula, the memory also needs to be understood, according to the specific situation appropriate use, pay attention to the scope of application of the formula.

Don't equate physics with mathematics, especially calculate problems to develop a good habit of writing format.

For most problems, the diagram is quite important, the key to the electrical circuit diagram is to simplify, we can distinguish the connection situation at a glance, the force analysis of mechanics is the basis of the problem, the optical path diagram can help us analyze the problem, and even the boiling evaporation of heat will use the diagram.

Of course, it's easier said than done, but don't be pressured, I think the key to middle and high school physics is to get started, and touch will be bypassed.

Physics is very interesting.

The net charge on the grounded conductor must be zero.

is wrong. (may be positively charged, may be negatively charged, and of course may not be charged) vacuum parallel plate capacitors are disconnected from the power supply after charging, and the electric field energy decreases after increasing the distance between the two plates.

It's a mistake. (should be an increase).

The field strength obtained by applying Gauss's theorem is only excited by the in-plane charge.

True On a sphere centered on a point charge, the field strength generated by that point charge is equal everywhere.

False (field strength direction can be different).

The direction of the field strength at a point in the field is the direction of the electric field force experienced when a point charge is placed at that point.

False (the direction of the field strength should be the direction of the electric field force of the positive charge, if it is a negative charge, the direction of the field strength is opposite to the direction of the electric field force of the negative charge).

2. Multiple-choice questions (5 questions in total, divided into points).

For an isolated conductor ball with an electric charge [b].

The field strength and electric potential in the conductor are both zero.

The field strength inside the b conductor is zero, while the electric potential is constant.

The electric potential in the c conductor is higher than on the surface of the conductor.

The electric potential in the conductor and the electric potential on the surface of the conductor cannot be determined.

Disconnect the power supply after charging the air parallel plate capacitor, and now increase the distance between the diode plates, then the capacitor: [b].

aThe capacitance increases, and the energy increases.

bCapacitance decreases and energy increases.

cThe capacitance is increased and the energy is reduced.

dThe capacitance decreases and the energy decreases.

For a conductor in electrostatic equilibrium, the field strength of [D] A is equal to zero.

b electric potential is equal to zero.

The c-field strength is equal but not necessarily zero.

dThe electric potential is equal but not necessarily zero.

In the direction that the electric field line is pointing at: [b].

aThe electric potential is increased.

bThe electric potential is reduced.

c. The electric field force is negative work, and the electric potential energy increases.

dThe electric field force is negative work, and the electric potential energy decreases.

In the following statement, the correct one is [c].

a The direction of the field strength at a certain point in the electric field is to place a charge at that point in the direction of the electric field force b on a spherical surface centered on the point charge, and the field strength generated by the charge at that point is the same everywhere c The direction of the field strength at a certain point in the electric field is the direction of the electric field force at the point of the positive charge d The magnitude of the field strength at each point in the uniform electric field must be equal, and the direction of the field strength is not necessarily the same.

Note: In the multiple-choice questions, I added ABCD before each option to facilitate the writing of the answer.

Hehe... Some physics topics need to be flexible. But most of the topics are "rigid".

Directly use formulas, concepts, etc. to solve problems. Actually, as long as you are familiar with the textbook, you can do something that suits you. (Be interested and confident, interest will keep you tired, and confidence will keep you motivated!) ）

If you can't learn physics well, the key is that you don't know those basic topics, and if you know the topics, you won't seriously analyze the force, and you just want to see through it at a glance!!

I am a junior in high school, and I am about to take the college entrance examination. Even if you can usually get the questions, but you can't do it during the exam, why ???

Because! You're nervous, you're scared, and you're going to do it wrong. This is quite normal.

Therefore, the questions that the teacher usually talks about, you must certify yourself to count a few times (a few times, not once) so that you can cultivate a sense of problem solving, as long as you take the exam in the future, don't rush for net profit, look at everything indifferently, don't think too much Don't think: I worked hard this time, I must do a good job!

There is a desire to practice, but there is no intention of success.

Actually, high school things.

It's not difficult to copy the theory, honestly you can understand it, you can't do it yourself, it's the foundation and method of the problem, you don't have a firm grasp of the knowledge points, you understand but don't have a deep understanding, in addition to listening, you can also elaborate on yourself, there is a certain process and ideas in your own mind, ask a few more whys, such as why the teacher said this, what is the impact of the teacher's reversing the order, if you can answer, it proves that you have mastered.

To give you a few suggestions, if your foundation is a little weak, it is recommended that you must take time to preview before class, the so-called preview, is to read through the content of the textbook first, word for word, and then combined with the diagram of the textbook, understand the content, so that the teacher can roughly understand the teacher's ideas and content before class, the teacher is generally retelling the textbook when taking the basic class, just more vivid.

After class, you must recall the content according to the outline listed by the teacher, and be able to explain each key point clearly, so that others ask you, you can answer well, and your thinking must be clear.

Then do some questions appropriately, the so-called appropriate, that is, according to your situation, the foundation is not good to do the basic questions, divergent thinking is not good to think about the questions. Be able to understand every sentence, don't get by.

If you are a high one.

Bai two,You can buy a teaching assistant zhi material casually (such as dao said that the textbook is completely interpreted,Queen Xiongzhuan's),Memorize all the typical example questions above,Whether you understand it or not,Write it silently every few days,After accumulating a lot,There is a feeling of solving the problem。

If you are a junior in high school, don't mess with those messy materials, people have told you to do a good job of the materials issued by the school, at most you can eat the college entrance examination questions in recent years thoroughly (that is, buy a book of the ten-year college entrance examination, or 53 or something like that), and avoid those mock questions.

I felt this way at the beginning, but it was much better to do more exercises, anyway, when I was doing the problems, I didn't want to be responsible.

If you don't understand it, you skip over it (of course, when you have plenty of time, you can't do it in the exam) and you don't know how to think about the questions.

Sometimes the more classic questions are written down, as well as the experimental questions and other attention items, the key points, formulas and rote memorization have to be memorized.

Don't always ask your classmates because you are greedy for all the right questions, the right answers, every wrong question must know the reasons for the mistakes and the ideas that lead to the mistakes, it is best to write them down in a notebook, look at them before the exam, and avoid repeating a type of question many times.

I can't say it clearly, so summarize it myself.

Take good notes, listen carefully to the class, develop your own unique problem-solving ideas, don't worry, take your time, ask the teacher more if you don't understand, pay attention to other people's problem-solving methods, it will definitely be effective, good luck!

Learning physics mainly depends on your own understanding!! It's useless to just listen to the teacher, because the types of objects are ever-changing.

Develop your own thinking of doing problems, learn more about the teacher's thinking, read the detailed answers to the wrong questions, and do the necessary amount of physics problems.

Utilizing the Uniform Acceleration Linear Motion Formula:

In any 2 consecutive equal time t, the displacement that occurs is sn, sn+1 (n+1 represents the east-east of the lower right).Its acceleration can be defined by the formula: a=(sn+1-sn) t 2

Therefore, a=((s3+s4)-(s1+s2)) 2t 2)).