Physics is too hard, what to do 20

It is not difficult to meet, but the difficulty is the reason why it is not yet clear.

Physics, physics, are some of the truths in the material world.

The knowledge of physics is closely related to real life. As long as we pay attention, we will find that the knowledge of physics is pervasive in this material world.

Why is it hard to ride a bicycle when it has less tire?

Why is the soles of mountain shoes so bad?

Why are double windows sound insulated well? Is it better to have a double-layer window with intermediate vacuum?

There are many real-world phenomena, and as long as we understand physics, we can understand what is going on at a glance.

Learn chapter by chapter, section by section, and ask the teacher until the teacher talks about knowledge.

You can find a senior teacher to learn, some school teachers are not good, not necessarily all the knowledge points can be told to you, in addition to do more questions, see more question types, the exam will be started.

**It's hard to say, look at it specifically

Combine more with reality, don't just abstract the topic, think about those aspects of life that each knowledge point corresponds to, and visual thinking can sometimes solve a big problem.

For example, when you learn about electricity, you can observe the connection of home circuits, check the manuals or nameplates of some electrical appliances, and of course you have to do some experiments. You can do physical experiments, or you can do some simulated experiments.

Everyone's spatial logical thinking ability is different, if you find that some problems are difficult to understand, don't worry, do more exercises to cultivate thinking ability, diligence can make up for the shortcomings. I'm sure you'll learn well.

Formulas and concepts must be understood, memorized, and then look at some example problems.

There are several possibilities for this. First, the physical foundation is weak. If you are in the second year of high school, and the level is still at the level of the second year of junior high school, you don't think it's strange.

Second, lack of interest and being in a state of coping. Some people hate their teachers or have never found inspiration for physics, so they slowly become enthusiastic about learning, and their foundation gradually weakens, and they feel that physics is more and more difficult to learn. Third, there is a lack of learning methods.

Each course has a special trick, how to learn physics? In fact, it is very simple, you must have a thorough understanding of important formulas and concepts, repeatedly understand, process, and transform them into your own, and after finding inspiration, everything will be easy to do. Don't memorize by rote, physics is not memorized, it is realized and practiced.

Fourth, there is a lack of capacity. If your information processing ability, representation ability, thinking conversion ability, working memory ability, and logical reasoning ability are seriously lower than the norm, then it is more difficult for you to learn physics well.

In response to these reasons, the following suggestions are given. First, understand your own potential, and if the problem is in your ability, it is recommended to pay attention to improving your potential according to the guidance of the planner in your daily study. Generally speaking, as long as the age is not more than 25 years old, a person's fluid intelligence (which decreases with age, aging intelligence, generally peaks at 25 and then slowly declines) can be improved through effective training.

Second, if you want to learn physics well, then make up your mind, don't fish for three days and dry your nets for two days, it's useless to have a whim, you have to make up your mind. Third, master learning methods and mindsets. In fact, learning this thing, to put it bluntly, is very simple, two quantities are known, one quantity is unknown, and the answer will come out as soon as the formula is calculated.

Complex problems are simplified, simple problems are repeated, it's as simple as that, the mentality is relaxed, and each one is broken, it's not a big deal. Fourth, do a good job of planning and time management. Most of people's success is not because they are smart, but because they are diligent and know how to plan.

Divide the time of each day, do a fixed thing at a relatively fixed time every day, it is difficult to succeed or not, just a physics, what is it.

There is no quick fix to improving comprehension. Can give you a little advice:

After you have learned a knowledge point, you need to do the corresponding exercises (moderate is good), and then you can think about "whether the problem can be solved by the previous method, is it simpler or more complicated", what kind of problem can be dealt with with with this knowledge point, and what are the prerequisites for using this knowledge point?

I believe that going through the above process will be helpful to you in understanding and summarizing skills.

The problem is not which discipline or what kind of problem, all the so-called problems are the same.

Remember the phrase "there is no qualitative leap without the accumulation of quantity", if you do not have a qualitative change, it can only indicate a problem, your amount has not been accumulated in place, so don't say "already worked hard", you still have space!

If you have a clear understanding of the process of motion, and understand which forces do positive work and which forces do negative work, you can use the kinetic energy theorem.

If you don't know the process of motion, you can just think about it, and you can use the conservation theorem like the conservation of mechanical energy, the conservation of energy, and so on.

In fact, when you write out the conservation theorem, put the kinetic energy aside from the power amplifier equation and the kinetic energy on the side, you will find that this equation is the kinetic energy theorem.

So there's no need to dwell on the issue of energy.

Two questions that are almost the same, but the solution ideas are different? However, for the same question, there are more than two ways to solve the problem. Ay...

I'm so good at physics, I didn't know that there was a formula w=ek, hehe.

It's just the wrong way to be attached. What you know is not in line with what it should be. To be clear, you have misunderstood something ...

How to solve the problem? In front of everyone, it's like a decision.,It's like a lot of tricks to understand the problem.。。。 I've never looked at any solution ideas.

No matter what the example question is, I always only look at one thing, and that is the answer... As for how each one understands, do not limit yourself to the minds of others ... Think from whichever angle you think you can figure out...

Approach all issues in your own way so that you don't get confused in other people's minds. Of course, there is one point, this own way is not limited to what kind of problem solving ideas. I've always been first-class for multiple-choice questions, fill-in-the-blank questions, true/false questions, and the speed of doing questions...

It's fast and I haven't even finished reading the question.,The answer is known.,The fastest ten seconds less than a question.。。。

However, doing calculation problems, although it is not that I can't, just because I can't write the process. All processes are crowded. Use your own thinking to sort out ideas that others can understand. At least I'm not going to lag behind here, and the accuracy rate is quite high...

I have a characteristic of doing math problems and physics problems, the answer is the first to squeeze the process... Choose a fill-in-the-blank question, and the answer will be over in seconds or tens of seconds... It's all the idea of not knowing how to write the process.。。。

It's all about understanding with your own potential, not confined to other people's thinking. I'm better than anyone else... At least at that time, he was a top master of physics in school...

1.Immediately after the collision, the speed of the trolley is to the left, and the size is maintained at 2m s

The slider continues to move to the right for 2 ms.

For the force analysis of the flatbed, the frictional force from the slider is to the right and the magnitude is mg=12n

So its acceleration is 6m s

1 After 3 seconds, the velocity is 0, and the distance to the left reaches the maximum (and then to the right).

In this 1 3s time, the average speed of the flatbed is 1m s to the left, so the displacement is to the left.

2.According to the law of conservation of momentum, the final common velocity of both is v'

Let the left be the positive direction, and there is m·v0-m·v0=(m+m)·v'

v'= So the velocity of the final collision with the wall again is.

3.Analysis of this process.

Every time the collision occurs, the trolley changes direction, but the mass of the trolley is lighter, so the total momentum is still to the right, which means that each collision system will move to the right at a common speed, resulting in the next collision.

From the energy point of view, such a collision itself has no energy loss (the velocity is constant), and the energy loss is caused by the friction between the two.

Thus, we apply conservation of energy to an infinite process, where (1 2)·(m+m)·v0 = mg· s

Get s=5 6m

This distance is the relative distance of the two, which is the minimum length required.