The World Cup has been opening for several days. According to the theory of the new college entrance examination and practical requirements, there is a lot of content that can be linked to our learning.
Hello everyone, I am the great god Yin, Yin Yulu. As a senior physics teacher in the top 10 key high schools in the country and also a well-known teaching aid, today I will briefly talk to you about the World Cup and physics.
1. particle
different parts of athletes playing football will cause different sports in football. The banana ball that is commonly known in football is to rotate the ball in the air and then shoot it at the goal. Can football be regarded as a particle in the process of studying banana balls? Under what circumstances, football can be regarded as particles can be examined,
2. Interaction - the relationship between force, force and movement
When we study the movement state of football, there is a lot of content that can be linked to our physics.
, such as gravity, elasticity, and , synthesis and decomposition of , etc.
For example, in football, the goalkeeper can effectively intercept the football at what speed to fly.
3. Flat throw
Yesterday, the scene where the Saudi defender flew out and headed the ball to the goal. Some students who have watched the game should have an impression. Here we can also set questions, such as knowing the level and speed of football, and finding the landing point of football.
These problems are good examples of physically solving real life problems.
Here, Teacher Yin will tell you what to do if you are not good at solving this kind of problem of combining life and physics?
What should I do if I know how to do it, but I often make mistakes in the exam?
First, you need to accurately master the knowledge content
high school problem solving. Knowledge and logic are the core, and the questions will change with the topic. There are endless questions to do, and you will find that you rarely encounter two questions in high school that are the same.
Therefore, you must pay attention to the accuracy and summary of your knowledge.
For example, everyone knows the equations of the Niu 2 particle group, but when it comes to concepts, few children can memorize them word by word: the sum of external forces exposed to the system is equal to the sum of the product of the mass and acceleration of each object.
There are many easy-to-miss points here, such as external forces, such as the sum of the product of mass and acceleration. Remembering these contents will affect the problem solving. Therefore, I will ask students to memorize what I said in class word for word and then solve the problem.
Second, you need to summarize and master the question types
If you want to get a high score in the exam, you must pay attention to the summary and mastery of the question types. We all know that there are formulas for twisting Rubik's Cubes, and the physical question type is like Rubik's Cube's formulas. You may be able to do it, but it must be slow.
takes the synthesis and decomposition of force as an example. We know that the system needs to analyze the stress of the system. Because the three forces are balanced, it is done using orthogonal decomposition method.
But how to list the formula and solve it, children who do not have a summary question type should think further.
In fact, the teacher should summarize this kind of content.
Children who have taken my class should know that the three forces balance is orthogonal decomposition method, and there are six solutions. According to the conditions given, whether it is a right-angle triangle, whether it is given angles or sides, see which solution is used to find out.
Physics is actually a very simple and interesting subject, just find the right method.
This is all for today's sharing. Follow Master Yin and become a scholarship together.
