Middle school students' physical knowledge and experience have great limitations, so their logical thinking ability and thinking quality are still relatively poor. The concrete manifestations are as follows: (1) The thinking is disorganized and poorly organized, and people often judge problems by intuition and experience and take reasoning for granted. (2) One-sided thinking, unable to comprehensively analyze problems, unable to grasp the essence of things and the key to solving problems. (3) The thinking lacks flexibility and is used to mechanically applying formulas. (4) Lack of logic and rigor in thinking.

The reasons for the formation of thinking disorders are generally the following:

1, the influence of pre-concept on physics learning. The concepts learned before will affect the understanding of the following content. Some of these ideas and experiences are correct, some are one-sided and even wrong.

2. Replace physical concepts with mathematical relations. Mathematics is an important tool for studying and studying physics, and it is an important ability requirement for students to use mathematical tools to solve physical problems, but physics is not mathematics, and physics is more important for physical facts, physical essence and physical relations. Because students are exposed to mathematics at the beginning of school, some students always have a "mathematical inertia" when analyzing physical problems, digitizing physical problems, ignoring the physical meaning expressed by physical formulas, thinking of mathematical operations when they see numbers, and rarely understanding them from the physical meaning, resulting in wrong answers. Therefore, when it comes to physical formulas that easily lead to confusion in thinking, we should focus on the physical meaning, the applicable conditions of the formulas, and the differences between physical formulas and mathematical formulas, so as to learn physics by physical thinking methods and urge students to form scientific analysis methods.

3. Thinking obstacles caused by mindset. The so-called mindset is a fixed way of thinking in which the human brain is repeatedly stimulated by some external signals. Thinking set often plays a negative role in analyzing and dealing with practical problems. The more times the same method is used, the stronger this tendency will be. When the specific situation changes slightly, people often can't jump out of the box of the past, making their thinking go astray.

4. Ignoring the thinking obstacles formed by implicit conditions. When using physical knowledge to solve practical problems, there are often many conditions, some of which are explicitly given, while others are implied between the lines or in the physical process. The key to deal with this kind of problem is to grasp the key words in the topic and find out the hidden conditions. If the implied conditions are not found or ignored, the questions can not be answered or the wrong conclusions can be drawn, thus forming thinking obstacles.