What is the most important thing in high school physics, and what is physics in high school

The understanding of motion (being able to abstract the process of motion in the mind), the analysis of forces, and the understanding of images (which require a strong understanding of formulas), as well as the basic knowledge in textbooks (there is basically no nonsense in physics textbooks, and scientific stories may involve questions about the history of physics

The most important thing is that if you can only memorize formulas but don't know how to use them, then it will be useless.

Here are some examples:

Chapter 2: Research on Linear Motion at Uniform Variable Speed. It includes the relationship between speed and time of linear motion with uniform speed, the relationship between displacement and time of linear motion with uniform speed, free fall motion, Galileo's research on free fall motion, etc.

Chapter 3: Interactions. Including the basic interaction of gravity, elastic force, frictional force, frictional force, force synthesis, force decomposition, etc.

Chapter 4: Newton's Laws of Motion. Including Newton's first law, Newton's second law, the system of mechanical units, Newton's third law, etc.

Chapter 5: Mechanical Energy and Its Conservation Law. It includes the pursuit of conservation quantity, work, power, gravitational potential energy, kinetic energy and kinetic energy theorem, the law of conservation of mechanical energy, the law of conservation of energy and energy, etc.

Chapter 6: Curvilinear Motion. Including curvilinear motion, the synthesis and decomposition of motion, the macro-closed law of flat throwing motion, the law of projectile motion, circular motion, centripetal acceleration, centripetal force and so on.

Chapter 7: Gravitation and Astronautics. Including the motion of the planets, the gravitational force between the sun and the planets, the law of universal gravitation, the achievements of the theory of universal gravitation, the limitations of classical mechanics, etc.

1 Depth of knowledge, <> theory

Deepening of physical understanding in high school.

In high school physics, in order to deepen the understanding of important physics knowledge, some will move from qualitative discussion to quantitative calculation, such as the relationship between force and motion, the concept of kinetic energy, electromagnetic induction, nuclear energy, etc.

2 Breadth of knowledge and expansion of scope.

In high school physics, it is necessary to expand the scope of physics knowledge and learn many new contents that have not been learned in junior high school, such as the synthesis and decomposition of forces and Newton.

The law of gravitation.

The theorem of momentum, the law of conservation of momentum.

the nature of light, etc.

3. Application of knowledge and improvement of ability.

In high school, it is not only necessary to learn physics knowledge, but more importantly, to improve the learning of physics knowledge and applied physics.

The ability of knowledge, in high school, is mainly self-learning ability and physical problem solving ability, and learn some commonly used methods of physical research.

In conclusion, high school physics vs junior high school physics.

In comparison, it is a spiral of amusement.

There are three high school physics textbooks, of which the first and second books are compulsory, and the third book is compulsory and elective. Physics is a general exam in most provinces.

The subject is also the college entrance examination subject, which occupies an important position in the study of high school.

Methods of analysis of the process.

1.Resolution process hierarchy: Generally speaking, complex physical processes are composed of several simple "sub-processes". Therefore, the most basic way to analyze physical processes is to hierarchize complex problems and dissolve them into multiple interrelated "sub-processes" to study.

2.Finding the intermediate state: Sometimes the division of stages is not easy, and it is also necessary to find out the key links that determine the intermediate state (or process) of physical phenomena from quantitative to qualitative change, and correctly analyze the physical process.

3.Straighten out the constraint relationship: The occurrence, development and change process of physical phenomena described in some comprehensive questions is a "comprehensive effect" of many factors that are interdependent and mutually restrictive.

In order to analyze correctly, it is necessary to observe and analyze in an all-round and multi-angle manner, grasp the law from the internal connection, straighten out the relationship between hunger and envy, and seek solutions.

4.Distinguish the conditions of change: Physical phenomena all occur and develop under certain conditions.

When conditions change, so do physical processes. When analyzing problems, special attention should be paid to distinguishing the changes in the physical limb spring process caused by changes in conditions, and avoid confusing problems with homogeneous and heterogeneous problems.

The core of high school physics is the study of the relationship between force and motion, but this force and motion are not so simple. In the case of force, one weight, two bullets and three frictions, to analyze the force, it may also be necessary to analyze the work done by the force, and the impulse of the force may also be sought. When it comes to electromagnetism, the force will add the electric field force, ampere force, and Lorentz force, so it is still the previous idea of force analysis, force work, and force impulse.

And what about sports? At the beginning, there is a linear motion with uniform variable speed, and the relevant physical quantities are calculated by acceleration and kinematics formulas. Later, I learned curvilinear motion, including parabolic body and circumference. These are just a few of our common sports. In the back of electromagnetism, the electric field is the parabola, and the magnetic field is the circumference.

There is only a little bit of knowledge in the whole high school physics subject, and the content is very, very little, and the rest are fragmentary electives. But you definitely don't think it's that simple when you learn it, what the hell is going on?Its characteristic is that although the content is very small, even if you memorize it all, write all the formulas silently very well, and write down the concept definition word for word, the problem may still not be right.

How to solve the problem

It is recommended that you do some common model problems first, because these are to help you get familiar with the formulas and solve these problems. If you're just dry and see a formula, a dead formula, it doesn't really make any sense. You must know how this formula is used to solve the problem in this problem, and you need to do some common exercises to get the formula very very proficient first.

In addition, you can do some slightly more comprehensive problems, which will use a lot of formulas, and you need to know how the different formulas are related to each other. This also requires a lot of practice, and when the problem involves multiple knowledge points, you need to know which formulas to use to solve the problem.

This is a uniform deceleration motion, and the acceleration of dismantling is a

Let s be the distance from the end point and t be the time before reaching the end point, then s = so the total length of the 20 pieces is, and t is the total time to cross the 20 boards.

In this way, you can calculate the time of each board when you apply it to the travel errand.