Inertia and the law of inertia are the same? What is the Law of Inertia?

Inertia is a property of an object that remains at rest or in a uniform linear motion. Its essence is that all objects have inertia, and the motion of the object does not require force to maintain. Inertia is an intrinsic property of an object, and it has inertia no matter what state the object is in.

The law of inertia is Newton's first law of motion, which refers to a law of motion in which all objects are not subjected to an external force (or are subjected to an external force, but the net force of the external force is zero), and the object always remains in a state of rest or a uniform linear motion due to inertia. Its essence reveals the relationship between force and motion: force is not what maintains the speed of motion of an object (state), but what changes the speed of motion of an object (state).

The two are not the same thing, and it is important to distinguish between them.

Different. The law of inertia states that an object always remains in a uniform linear motion or at rest when the combined external force is 0.

Inertia is: the property of an object to always maintain a uniform linear motion or a state of rest when the resultant external force is 0.

The three erroneous statements about inertia are:1. Moving objects have inertia, while stationary objects have no inertia

2. The inertia of objects with large moving speed is large3. "Habitual dislike and sexuality" is the "law of inertia".4. The smaller the gravity, the smaller the inertia; When the object is in weightlessness, the inertia disappears

5. Inertia is a special force

Inertia is one of the most important concepts in junior high school physicsIt is a bridge for the correct understanding of force and motion, and the concept of inertia is not clearly understood, and even affects the construction of high school mechanics knowledge. In junior high school physics teaching, due to the coexistence of inertia and abstraction, it brings certain difficulties to students' understanding.

The law of inertia is missingIn an effective frame of reference, the object always maintains a uniform linear motion or a state of rest when it is not in equilibrium by any external force or force. (Wang, China, 2010).

The law of inertia is also known as Newton's first law of motion. It scientifically expounds the two physical concepts of force and inertia, correctly explains the relationship between force and the state of motion, and proposes that all objects have the property of keeping their state of motion unchanged - inertia, which is a fundamental law in physics.

Newton's first law gives a frame of reference without acceleration - the inertial frame, which makes it meaningful for people to study physical problems and measure physical quantities, thus making it the starting point of the whole mechanics and even physics. Newton.

2. The third law and the system of particle mechanics established by Newton's laws of motion, such as the momentum theorem, the law of conservation of momentum, the kinetic energy theorem, etc., only hold true for inertial frames.

Newton's first law is the premise and foundation of other principles. The fundamental concepts contained in the first law, which lay the conceptual foundation of classical mechanics, thus placing it in the position of the premise of the first principle in the theoretical system, which is manifested in:

1) For the first time, it refuted the erroneous concept of force by Aristotle and others, which lasted for more than 2,000 years, and laid the foundation for establishing a correct concept of force.

2) For the first time, a qualitative definition of force (including the nature of force and the effect of force) was given scientifically.

3) For the first time, several basic concepts of classical mechanics were proposed.

The second and third laws and the principles of the particle mechanics system established by Newton's laws of motion laid the conceptual foundation.

The law of inertia is actually Newton's first law.

1. Introduction to the law of inertia:

Newton's first law of motion, abbreviated as Newton's first law. It is also called the law of inertia. Common full statements:

Any object should remain in a uniform linear motion or at rest until an external force forces it to change its state of motion. In 1687, the English physicist Isaac Newton proposed Newton's laws of motion in his magnum opus "Mathematical Principles of Natural Philosophy", and Newton's first law of motion is one of them.

Newton's first law and Newton's first.

The second and third laws constitute a complete system of Newtonian mechanics. Newton's first law gives the concept of an inertial frame, the first.

2. The third law and the system of particle mechanics established by Newton's laws of motion are only true for inertial frames. Therefore, Newton's first law is indispensable and is an important law of mechanics that is completely independent.

2. Deduction process:

Galileo's approach to kinematics was a combination of experiment and mathematics, focusing on both logical reasoning and experimentation. His inference for smooth inclined planes was obtained through experimental observation and inference. But this completely smooth bevel does not exist in reality, because the friction cannot be completely eliminated, so the ideal bevel experiment belongs to the logical reasoning part of Galileo.

3. Galileo's ideal inclined plane experiment

Galileo's experiment with an ideal inclined plane had the ball roll down from rest along a smooth inclined plane, and the ball would roll up to another inclined plane, reach a similar height and then roll down. He reasoned that it was only because of friction that the ball failed to reach its original height.

Then he reduced the inclination of the blue side of the next oblique hall, and the ball still reached the same height on this inclined plane, but this time it rolled farther away. Continue to reduce the inclination of the second bevel and the ball will roll farther when it reaches the same height.

So he studied the situation when the bevel was flat, and it was clear that the ball would roll down forever. That is to say, the force is not the reason for maintaining the motion of the object, i.e., maintaining the velocity of the object, but precisely the reason for changing the state of motion of the object, i.e., changing the velocity of the object. Therefore, once an object has a certain velocity, if it is not subjected to force, it will move in a straight line at a uniform velocity.

The law of inertia is actually the first law of motion of the bull attack. It scientifically expounded the two physical concepts of force and inertia, correctly explained the relationship between force and the state of motion, and proposed that all objects have the property of keeping their state of motion unchanged - inertia, which is a fundamental law in physics.

The law of inertia, also known as Newton's first law, is one of the fundamental principles in classical mechanics.

1. Inertia theorem:

If there is no external force acting on an object or the net force of the external force is zero, then the object will remain at rest or in a state of uniform linear motion.

This law emphasizes the property that an object will remain in its state of motion without external interference. In other words, the object either remains at rest or keeps moving in a straight line at a uniform speed until an external force causes it to change.

2. The significance of the law of inertia:

The law of inertia provides important theoretical support for the basis of motion. It helps us understand why an object continues to be in motion, or why an object remains stationary without knowing that an external force is acting on it. This law was also the starting point for Newtonian mechanics, which provided the basis for the subsequent laws of motion and the concept of force.

The law of inertia has a wide range of practical applications, not only in everyday life, but also in the field of scientific research and engineering. For example, the inertia of the vehicle will affect the driving and braking, and the inertia of the aircraft will affect the change of the navigation trajectory.

In conclusion, the law of inertia is one of the basic principles for understanding the motion of objects and the influence of external forces, which lays the foundation for the development of classical mechanics.

Characteristics of the theorem of inertia

Invariance of the state of motion of an object:

The law of inertia emphasizes that an object will remain in its state of motion when there is no external force acting on it. If the object is stationary, it remains stationary; If the object moves in a straight line at a uniform speed, then it keeps moving in a straight line at a uniform speed. This reflects the object's resistance to state changes.

An external force is required to change the state:

The law of inertia states that to change the state of motion of an object, an external force must be applied. In other words, an object does not change its state of stationary or uniform linear motion on its own, and an external force is required to cause a change of state.

The impact of quality:

The inertia of an object is related to its mass. The more massive the object, the greater its inertia, i.e., the greater its resistance to state changes. This also explains why massive objects usually change more slowly when subjected to external forces.

Applications of daily life and scientific research:

The law of inertia can not only be observed in daily life, such as the inertia of the vehicle makes us need to brake to stop, and the inertia of the aircraft affects the direction of navigation, etc., but also has a wide range of applications in the field of scientific research and engineering.

Newton's first law of movement is referred to as Newton's first law of slow land. Also known as the law of inertia. A common full formulation: any object must remain in a uniform linear motion or at rest until an external force forces it to change its state of motion.

Different frames of reference: The inertial frame can be simply said to be a frame of reference that is stationary or moving in a uniform linear motion relative to the ground, while a non-inertial frame is a frame of reference that accelerates or decelerates relative to the ground.

Newton's laws are different between the two: in the inertial frame, Newton's first.

The second law holds for the first and second laws, and in the non-inertial frame Newton.

1. The second law does not hold.

The forces acting are different: when the object is at rest relative to the non-inertial frame, the Coriolis inertial force is zero and is only affected by the implicated inertial force, which is commonly referred to as the inertial force. The force acting on the object, in addition to the external force, also involves the inertial force and the Coriolis inertial force, which do not obey the usual definition of force, but can produce the effect of force in a non-inertial frame.