Review the syllabus of the first three chapters of Physics in Senior 1, and the knowledge points in

Every chapter of high school physics needs to be carefully organized, so that nothing is missed in the exam. The following is a summary of my carefully selected knowledge about the first chapter of the first year of physics for your reading.

Senior 1 Physics Compulsory 1 Chapter 1 Section 3: Description of the speed of movement

Basic concepts of kinematics.

Motion is absolute, and rest is relative. Whether an object is in motion or at rest is relative to the frame of reference.

The choice of frame of reference is arbitrary, and the object chosen as the frame of reference, we assume that it is stationary. Choosing different objects as frames of reference may lead to different conclusions, but the description of motion should be as simple as possible.

The ground is usually used as a frame of reference.

2. Particle point: Definition: A point with mass used to replace an object. A particle is an idealized model, an abstraction of science.

The condition for an object to be considered as a particle: when studying the motion of an object, the size and shape of the object have a negligible influence on the results. And whether the object can be regarded as a particle point should be analyzed on a case-by-case basis.

Key points] 1) The size and shape of the object cannot be used as a criterion to judge whether an object can be regarded as a particle, the key depends on the nature of the problem under study. When the size and shape of the object have a negligible effect on the problem under study, the object can be considered a particle.

2) A particle is not a point with very little mass, and it should be distinguished from a "point" in geometry

3. Time and time:

A moment is a moment in time, represented by a point on the timeline, which corresponds to the amount of state; Time is the interval between the start moment and the end time, represented by a line segment on the timeline, which corresponds to the amount of process.

4. Displacement and distance:

Displacement is used to describe the change of the position of the particle, which is a directed line segment of the particle from the initial position to the last position, which is a vector;

The distance is the length of the trajectory of the particle and is a scalar quantity.

5. Velocity: The physical quantity used to describe the speed and direction of the movement of the particle is a vector quantity.

1) Average velocity: is the ratio of the displacement to the time taken to pass through this displacement, which is defined as v = x δt, and the direction is the same as that of the displacement. The average speed can only be roughly described as a variable speed movement.

2) Instantaneous velocity: It is the speed of the particle at a certain time or through a certain position, and the instantaneous velocity is referred to as velocity, which can move precisely at variable speed. The magnitude of instantaneous velocity is referred to as velocity, and it is a scalar quantity.

6. Acceleration: The quantity describes the physical quantity of the speed change, and its definition is as follows.

Acceleration is a vector quantity whose direction is the same as the amount of change in velocity (note that it has nothing to do with the direction of velocity) and its magnitude is determined by two factors.

Error-prone. 1. Ignore the vector nature of displacement, velocity, and acceleration, and only consider the size, and do not pay attention to the direction.

2. Misunderstand the average speed and use it at will.

3. Confuse the relationship between velocity, increment of velocity, and acceleration.

This chapter talks about the two lines of force and energy. The aspect of force is the field strength, and the image indicates the field strength of the electric field wires. Keep in mind the features.

and several methods of drawing field lines for electric fields. The application of force is electrostatic shielding. The aspect of energy is the electric potential.

e/q。Include the following knowledge points; The potential difference u= a- bElectric potential energy e=q

The work done by the electric field force w = kinetic energy theorem can also be used. It is an equipotential surface that represents the electric potential. Keep in mind his characteristics.

The application of energy is capacitors, capacitors. To know what is charge and discharge. The plates are charged.

The c=q composite application is the acceleration and deflection of charged particles in an electric field. The above is just the skeleton. You have to refine it.

This chapter is all about electrostatic fields, and there are nine sections of knowledge.

Section 1 Electric Charge and Its Conservation Law Mainly Talking about Three Ways of Generating Electricity and the Law of Conservation of Electric Charge Section 2 Coulomb's Law f KQ1Q2 R2 You can learn by analogy with gravitational force Section 3 Electric Field Strength Mainly grasp the two expressions of electric field strength e Section 4 Electric potential energy and electric potential Master the relationship between themSection 5 Electric potential difference It can also be learned by analogy with gravity force potential energy.

Section 6 The Relationship between the Electric Potential Difference and the Electric Field Strength This section is very important, and Section 7 The Application of Electrostatic Phenomena Understanding is not the point.

Section 8 Capacitance of Capacitors Mainly master the deterministic and defining formula of capacitance CSection 9 The motion of charged particles in the electric field (similar to flat throwing motion) The key point is that the college entrance examination must be taken, I hope it can help you!

In nature, there are only two electric charges, positive and negative, and the electric charge forms an electric field in its surrounding space, and the interaction force between the charges occurs through the electric field. The amount of electric charge is called the amount of electricity. Basic charge. The amount of charged body charge is equal to an integer multiple of the element charge (q=ne).

Electrifying an object is also called electricity. There are three ways to electrify an object: triboelectric contact electrification and inductive electrification.

Charge can neither be created nor destroyed, it can only be transferred from one object to another, or from one part of the body to another, which is called the law of conservation of charge.

The shape, size and charge distribution of charged bodies have negligible influence on the interaction force between them, and such charged bodies can be regarded as charged points, which are called point charges.

It mainly talks about the knowledge of electricity, the concept of electric charge, electrostatic field, electric field force, etc.