Compulsory 2, mainly about curvilinear motion, gravity and mechanical energy. Curved motion is different from kinematics of forced motion, because forced motion is linear motion. In fact, there are many similarities between curves and straight lines. For example, acceleration analysis is required. However, there are mainly two kinds of learning in curve motion, one is flat throwing, the other is circular motion, and there are still many formulas to remember. Gravity is an independent part of high school physics, that is, gravity will not be involved in future study, and most of the problems are also reasoning problems, which calculate the proportional relationship. The most important thing is mechanical energy, which is the fusion of compulsory one and compulsory two. Here, everything you have learned before will be integrated. How to do it? In a word, make an equation. How to do the equation? List the equations according to the formula.
Elective course 3- 1, this book has three chapters, namely electric field, constant current and magnetic field. Electric field is a relatively independent chapter, telling a world you have never seen before. When studying, you need to listen to the class well at the beginning, because as long as you don't listen well in one class, you may not understand it later. However, it is not difficult, just put your heart into it. The next step is constant current, which is the ohm's law in your junior high school. There are many things to remember here. The college entrance examination will almost only test questions, there will be no multiple-choice questions and no big questions. The chapter of magnetic field is a combination of compulsory one and compulsory two, which requires familiarity with force analysis and high requirements for plane geometry in mathematics. But your knowledge of plane geometry in junior high school is enough and difficult, and it is also a hot topic at the end of the college entrance examination. It doesn't matter if you don't learn thoroughly the first time. Take your time.
Elective course 3-2 mainly consists of two chapters. One is electromagnetic induction. Are you familiar with it? Yes, there is in junior high school, but high school is very complicated, and there will be mathematical calculations, but our junior high school electromagnetic induction will not be calculated. The difficulty is moderate, and it is also the focus of the college entrance examination, because there are many exams. The next chapter is the application of alternating current, that is, electromagnetic induction, which is not often taken in the college entrance examination.
Elective courses 3-3 mainly focus on the laws of thermodynamics. This book is generally not chosen in high schools.
Elective courses 3-4 mainly focus on mechanical waves and optics. The knowledge points of this book are relatively independent, that is, you can't use the knowledge you have learned before. Listen carefully when you learn, but fortunately it's not difficult.
Elective courses 3-5 mainly focus on near momentum and nucleus. Momentum is an extension of the chapter of compulsory mechanical energy, which is difficult, but its difficulty lies mainly in calculation. Doing it alone will not be a big problem, so it is still easy to learn. Nucleus is almost a must in the college entrance examination. There are two parts, one is photoelectric effect, and the other is hydrogen atom spectrum. These two parts are not calculated, and they are concepts that you need to remember well.