What is the relationship between inertial force and frictional force? 5

First of all, please allow to correct you a mistake, or you are a slip of the tongue, the statement of inertial force is wrong, objects have inertia, and inertia is the property of an object. There is no such thing as inertial force.

Your question is: Objects of different mass, v and u are the same, they go through the same time and distance, stop together, and are confused about this phenomenon, right? Or you think that the greater the mass, the harder it will be to stop, and the farther it will move.

But the more mass the object, the greater the friction and the greater the force that makes it stop, so s = v 2ug is exactly right and there is no problem.

There is a mass m on both sides of the equation, which can be cancelled out.

For different objects, give them an initial velocity to stop under the action of frictional force. When there is the same initial velocity v and coefficient of friction u, the greater the mass, the greater the kinetic energy, and the greater the frictional force.

In the case of ignoring other air resistance, etc., the distance s and mass m are irrelevant.

What you want is the freedom of the car, relying on the friction of the ground to stop the car, which should not make much difference between a heavy car and a light car.

However, in a general sense, the heavy car is not easy to stop, which refers to the method of braking, and the friction car of the brake has nothing to do with the weight of the vehicle, but is related to the pressure of the brake pads. Therefore, the result is still that it is difficult to stop heavy vehicles.

Friction is a relatively troublesome force in mechanics because it has a lot of content and a wide range in the college entrance examination. Through visual examples, we can understand the method of judging the direction of friction and the calculation of size.

Inertia is not a force, it is a manifestation of the resistance of a mass to an external force.

Force and friction are closely related. Friction refers to the resistance experienced by two surfaces in contact with each other due to friction against each other when they are in relative motion. If the force exerted by an object is less than the static friction on the surface on which it is located, then the object remains at rest.

If the force exerted by the object is greater than the static friction, then the object will start sliding, and the frictional force that occurs at this time is called kinetic friction. Therefore, as long as there is relative motion, friction will occur, and the magnitude of friction is related to the magnitude of the force, that is, the greater the force, the friction will also increase. Furthermore, the coefficient of friction between the surfaces of different substances is different, which also has an impact on the relationship between force and friction.

Friction has nothing to do with pull.

The magnitude of sliding friction is related to the magnitude of the roughness of the contact surface and the magnitude of the pressure. The greater the pressure, the rougher the contact surface of the object, and the greater the sliding friction generated.

The methods of increasing the favorable friction are: increasing the pressure, increasing the roughness of the contact surface, and the magnitude of the pressure. Ways to reduce harmful friction are: reduce pressure, make the object and the contact surface smooth, separate the object from the contact surface, change the slide to roll, etc.

There is no direct relationship between the magnitude of the tensile force and the friction force, which means that the magnitude of the tensile force cannot be decisively derived from the magnitude of the frictional force, and vice versa. The perpetrators of tension and friction are both foreign objects, and the foreign objects are not necessarily the same thing, and their size is affected by the state of motion of the object, and their relationship is not so obvious, only a little related in special cases.

When two objects that are in contact with each other and squeezed each other, when they are in relative motion or have a relative tendency to motion, a force is generated on the contact surface that hinders the relative motion or relative tendency of motion, and this force is called friction. The direction of frictional force is opposite to the direction of the relative motion of the object or the relative tendency of motion. There are three types of friction: sliding friction, static friction, and rolling friction.

Tension is defined by the effect of the force, from the nature of the force, the tension force is also an elastic force, whereas from the object of the force, the tension force may be an internal force or an external force. If the object is subjected to two forces, drag and tensile force, if the object moves in a straight line at a uniform speed or remains at rest, then at this time f pull = f resistance, the pull force and the drag force are a pair of balanced forces, and the object is in a state of equilibrium of two forces (the net force is zero). In a specific case, if the object is in accelerated motion, then f pulls and f-resists; If the object does a deceleration motion, then f pull< f-resistance.

Summary. 1.Both inertial and torsional forces are a consequential force, i.e., they are forces that arise due to a change in the state of motion of an object.

2.Both inertial force and torsional force are very important forces, and they are widely used in various fields, such as machinery, automobiles, aircraft, etc. 3.

Both inertial and torsional forces need to be measured and calculated by special equipment or devices, which requires a certain amount of knowledge and skill in physics. 4.Inertial and torsional forces have a wide range of applications in the field of engineering, and they are related to the performance and efficiency of designing and manufacturing various machinery and devices.

1.Both inertial and torsional forces are consequential forces, i.e., they are forces that arise due to a change in the general state of motion of the object. 2.

Both inertial force and torsional force are very important forces, and they are widely used in various fields, such as machinery, automobiles, aircraft, etc. 3.Both inertial and torsional forces need to be measured and calculated by special equipment or devices, which requires a certain amount of knowledge and skill in physics.

4.Inertial force and torsion force are widely used in the field of engineering, and they are related to the design and manufacture of various machinery and devices for their performance and efficiency. <>

Both inertial force and torsional force are fundamental concepts in physics, and there is a close connection between them, both of which are related to the state of motion of an object.

1. Friction.

1) Definition: Two objects in contact with each other when they are about to occur or have been in relative motion. It will produce a kind of osmotic lifting force on the contact surface that hinders the relative motion, and this force is called friction force.

2) The following three conditions must be met for friction between objects to occur:

First, the objects are in contact with each other and squeezed.

Second, the contact surface is rough.

Thirdly, there is a tendency or relative motion between objects.

The first phenomenon is due to the presence of frictional force, and the second phenomenon is due to the existence of inertia.

Sliding friction is the force that hinders the relative motion of objects in contact with each other, not necessarily the force that hinders the motion of the object. That is, friction is not necessarily a drag, it can also be the driving force that makes an object move, and it should be clear that the obstacle to "relative motion" is to use objects in contact with each other as references.

Inertia is an intrinsic property of an object, which is manifested as a degree of resistance of an object to changes in its state of motion, and mass is a measure of the inertia of an object. When the external force acting on the object is zero, the inertia is manifested as the object keeping its state of motion unchanged, that is, keeping it at rest or moving in a straight line at a uniform speed; When the external force acting on the object is not zero, inertia is expressed as the degree of difficulty with which the external force changes the state of motion of the object.

Master. Please analyze the basic principles of physics. Otherwise, subjective and empirical errors will be made.

There is an intuitive error in your formulation, which is that "the tablecloth is removed and the objects on the table do not move", which is impossible. As long as there is friction, no matter how fast you pull, the object on the table will move. It's just the same object, the faster it is pulled, the closer the object falls to its original position!

In addition, we have an active error, it seems that the heavier the object, the more it will stay in place.

Analysis: First, let's assume a system. The weight A is placed on the piece of paper B, and the piece of paper is pulled apart at a velocity v, assuming that the coefficient of friction f is constant.

Analyze object a, the horizontal direction is only subject to friction m·g·f. is a fixed value. Acceleration a is also a fixed value and is independent of the mass of the object.

The greater the v, the shorter the time t it takes for the piece of paper to leave the table, and the smaller the displacement of the object moving at time t with constant acceleration a.

Think about it again. It's good that you can think about it. However, it is necessary to overcome subjectivity and use laws and rational analysis.

Scenario 1Pull the piece of paper slowly, and the eraser will move with the piece of paper.

Pull slowly, v is very small, the eraser reaches v in a short time, and the relative gliding is almost invisible to the naked eye. So it feels like we're moving together. Actually, there is a tiny relative slide to.

Scenario 2Quickly pull the piece of paper and the eraser will fall on the table.

Pull quickly, v is very large, and in a very short time the piece of paper is opened. In such a short period of time, the eraser can only reach a small velocity v of a·t, and the displacement is very small, and it seems to fall in place.

Therefore, this student, when you think about a physics problem, you can assume the situation yourself, and then make a list of formulas with your knowledge to see which is the variable and how it changes. Developing this habit will give you a clear idea of how to deal with the less common questions in the final exam.

Physics is an extremely rational subject. We must overcome subjective guesswork and judgment. With your existing formulas and knowledge, it is enough to solve this problem. Be hands-on.

Good luck in your physics exam

Upstairs makes sense, just a little experiential. "Too late".

The first case is that the eraser is subjected to the static friction of the paper;

The second is relative motion. Its acceleration is provided by the sliding friction given to it by the paper, which is sliding some distance relative to the paper.

The first is frictional force that causes the object to move (the state of motion changes, from rest to motion).

The second can be understood in terms of momentum p=ft because the time is very short, so p (momentum) is small, and because p=mv, the velocity of the rubber is small (negligible) and can be regarded as stationary.

Quickly pumped away, the time is fast, and the speed of the eraser has not yet been reflected. er pulls slowly, and gives the eraser time. . .

The first is because friction drives the eraser.

The second one is too fast to change its inertia.