Summary of high school physics question types and solution methods

The induction of high school physics question types and problem-solving skills are as follows:

1.Force analysis often leaks "force".

The analysis of the force on the object is the most important and basic knowledge in physics, and there are two kinds of analysis methods: "integral method" and "isolation method". The analysis of the force on the object can be said to run through the whole high school physics, such as the driving force, elastic force (pushing, pulling, lifting, compressing) and frictional force (static friction and sliding friction) in mechanics, the electric field force in the electric field (Coulomb force), and the Lovi Gaorenz force (ampere force) in the magnetic field.

In the force analysis, the most difficult thing is to determine the direction of the force, and the easiest mistake is that the force analysis often misses a certain force. In the process of force analysis, especially in the "nine, electricity, magnetism" comprehensive problem, the first step is force analysis, although the idea of solving the problem is correct, but the candidate often misses a force (even gravity) for the analysis, there is one less force to do work, so that the answer is very different from the correct result, and the whole question score is lost.

It should also be noted that when analyzing the change of a certain force, the methods used are mathematical calculations, the dynamic vector angular method (note that only the magnitude of one force is not changed in the direction, the second force is variable in the direction of the second force, and the third force is changed in the direction of the magnitude) and the limit method (pay attention to the monotonic change of the force).

2.Lack of understanding of friction.

The friction force includes the static friction force, because it has the characteristics of "hiddenness", "indefiniteness" and the intervention of the knowledge of "referring to the relative motion or relative tendency of the large scale", and it has become the most difficult force to understand and grasp among all forces.

Once there is friction in any topic, its difficulty and complexity will increase. The most typical is the "conveyor belt problem", which can include all possible situations of friction, and it is recommended that students have a good understanding of friction from the following four aspects:

1) The sliding friction experienced by an object is always opposite to its relative direction of motion. The difficulty here lies in the understanding of relative motion; It is explained that the magnitude of the sliding friction force is slightly smaller than the maximum static friction force, but it is often equal to the maximum static friction force when calculating. Also, when calculating sliding friction, that positive pressure is not necessarily equal to gravity.

2) The static friction force of the object is always opposite to the relative motion of the object. Obviously, the most difficult thing to understand is the judgment of the "relative movement trend side". The hypothetical method can be used to judge the new, namely; If there is no friction, then the direction of motion of the object is the direction of the relative trend of motion; It should also be noted that the magnitude of static friction is variable and can be solved by the equilibrium condition of the object.

The main skills of answering high school physics questions are: grasping key words, mining implicit conditions, attaching importance to the analysis of the process of basic mu confession (drawing a good situation diagram), being cautious and meticulous, beware of stereotyped thinking, and being good at quickly extracting effective information from complex situations

When reading the questions, we should not only pay attention to the explicit conditions that give specific numbers or letters, but also grasp some other narrative language, especially some key words. The so-called key words refer to some restrictive language proposed in the title, which either describes the physical changes involved in the title, or defines the process of change.

The reason why the physics calculation questions in the college entrance examination are more difficult is not only because the physical process is complex and changeable, but also because the potential conditions are hidden and difficult to find, which often makes candidates feel that the conditions are insufficient and fall into trouble, which is also testing the profundity of the candidates' thinking. In the process of reviewing the problem, the implicit conditions must be fully excavated, which is often the key to solving the problem. Some of the implicit conditions are not deeply hidden, and they are often seen in ordinary times, and they are easy to excavate, but there are also some implicit conditions that are hidden deep or uncommon, and it is difficult to excavate.

2.Emphasis is placed on the analysis of the basic process (drawing a schematic diagram of the situation).

Drawing a good analytical sketch is an important step in the examination of the problem, which helps to establish a clear and orderly physical process and establish the relationship between physical quantities, and can concretize and visualize the problem. The analysis diagram can be a motion process diagram, a force analysis diagram, a state change diagram, or a schematic diagram obtained by the projection method or the equivalent method. In the process of reviewing the problem, it is necessary to develop the habit of drawing schematic diagrams.

To solve physics problems, try to draw as much as possible, and the diagram can help us understand the meaning of the problem, the analysis process and the changes of each physical quantity in the process. There is hardly a physical problem that is not reinforced by diagrams, which in turn force us to examine the details of the problem and the relationships between them.

3.Be cautious and meticulous, and beware of stereotyped thinking

It is common to encounter some physics questions that deliberately give more known conditions, or carefully set some traps and arrange some specious judgments when expressing physical situations, so as to form distracting factors and test students' ability to distinguish between right and wrong.

4.Good at quickly extracting useful information from complex situations

Nowadays, there are quite a lot of introductory and descriptive sentences in the physics test questions, and the amount of information in the questions is very large, so you should have a keen eye and flexible thinking when solving the questions, and be good at quickly extracting effective information from complex situations and accurately understanding the meaning of the questions.

The recursive method is to solve the situation after the object has interacted with the object many times. That is, when there are many interrelated objects involved in the problem and there are regularities, the mathematical ideas should be applied according to the characteristics of the problem to classify the studied problems, and then the general formula should be obtained. The specific method is to first analyze the situation of a certain effect and draw conclusions.

Then, according to the repetition of multiple actions and their commonality, the conclusions are generalized, and then combined with mathematical knowledge to solve. The key to solving the problem with the recursive method is to derive the recursive relationship that connects the two adjacent effects.

The skills and methods of high school physical comprehension questions include overall grasp, multiple-choice skills, fill-in-the-blank skills, etc.

1. The overall grasp includes careful examination of the question, association of ideas, step-by-step formula, and attention to the first step. Try to list standard equations. Mark the questions in question and review them after they are done. Be careful when doing the questions, and skip them first when you encounter difficult problems.

2. The multiple-choice skills include from simple to difficult, and the time for each question should not exceed 5 minutes. Multiple-choice questions that are uncertain are skipped. Pay attention to the keywords and conditions in the question, and accurately and quickly determine the chapter of the knowledge points involved in the question.

3. Fill-in-the-blank skills include direct memory fill-in-the-blank, relying on memory to respond quickly and accurately. Analytically fill in the blanks, analyze the knowledge points tested in the rough and rough of the questions. Fill-in-the-blank calculation, and the answers should be filled in as required.

Introduction to High School Physics:

1. High school physics is divided into the synthesis and decomposition of force, Newton's law of universal gravitation, the momentum theorem, the law of conservation of momentum, and the nature of light. There are three high school physics textbooks, of which the first and second books are compulsory, and the third book is compulsory and elective. Bi Ba Zhao.

2. Physics is both a college entrance examination subject and a college entrance examination subject in most provinces, and occupies an important position in high school learning.

3. High school physics should deepen the understanding of important physics knowledge, and some of them will move from qualitative discussion to quantitative calculation, such as the relationship between force and motion, the concept of kinetic energy, electromagnetic induction, nuclear hand rental, etc. In conclusion, high school physics is a spiral compared to junior high school physics.

4. In the training of physics exercises, causal analysis is carried out from different directions with different ways of thinking, which is conducive to the development of multi-directional thinking.