Why does static friction change 10

The resting state is in equilibrium.

In this case, the static friction force is in equilibrium with other forces or their components (opposite to the static friction force) experienced by the object.

So, if there is a change in other forces or components of the object, the static friction force changes.

When the object has pressure on the horizontal plane and the roughness of the contact surface remains unchanged, if it moves at a uniform speed, the sliding friction does not change.

You can see from the name, static friction, first of all, this friction force is to make the object rest, to make the object stationary, you push an object, suppose you give him a force of 5n, the friction force he receives is not equal to 5n, he will not be still, he will definitely move, just like two people tug-of-war, one force is big and the other is small, then the big force will definitely pull the small force. It's not static. If you give him a force of 10n, and the object is still subject to static friction to remain stationary, then the friction force he receives is also 10n, that is to say, the static friction force is the force that makes the object stationary, which is always the same as the force you give him, and the force you give is large, then the static friction force is great, which is why the static friction force will change.

The force is reciprocal, as if the force did not push the object forward, the force and friction (of course, gravity and pressure) on the object; The force you give and the friction force are a pair of balanced forces, if you give more force, the friction force will increase to overcome your force until your force increases to a little bit greater than the maximum static friction force and the object will move.

In short, the static friction and the force you give cancel each other out, and the amount of static friction will change with the amount of force applied.

Friction is the opposite of the acting force, when it is at rest, the friction force is equal to the action, when the force increases, the friction force increases, and when the force decreases, the friction decreases, so the friction force changes.

The static friction increases from 0 to the maximum static friction according to the tensile force, and decreases to the friction force after the object moves.

According to the equilibrium condition, the static friction is equal to the force in the opposite direction.

Static friction – the beginning of the universe.

When the tensile force is less than the maximum static friction force.

It is only related to the size of the tensile force.

When the tensile force reaches the maximum static friction force, it is equal to the maximum static friction force, and when the tensile force increases, the object moves and becomes a sliding friction force.

The magnitude of the maximum static friction is related to the magnitude of the pressure, the material of the contact surface, the roughness of the contact surface, and the size of the contact area.

In general, the maximum static friction is greater than the sliding friction.

What factors affect the amount of friction.

There are two factors that affect the amount of friction: 1The magnitude of friction is related to the pressure between the contact surfaces, and when the roughness of the contact surface is constant, the greater the pressure, the greater the friction.

We have such common sense in life, when the bicycle tire is insufficient, it is more laborious to ride the Lingnian company. 2.The magnitude of friction is related to the roughness of the contact surface, and when the pressure is constant, the rougher the contact surface, the greater the friction.

What is a tug-of-war competition for? Many people will say: Of course, it is stronger than which team!

Actually, the question is not that simple. A force analysis of the two teams in the tug-of-war shows that as long as the tensile force is less than the maximum static friction with the ground, it will not be pulled. Therefore, increasing the friction with the ground becomes the key to victory or defeat.

First of all, wearing shoes with concave and convex soles can increase the coefficient of friction and increase the friction force; In addition, the heavier the weight of the players, the greater the pressure on the ground, and the greater the friction. When a tall slag adult and a child tug of war, the adult is easy to win, and the key is that the adult weighs more than the child. Also, in a tug-of-war, winning or losing depends a lot on people's skills.

For example, if you push the ground, you can put more pressure on the ground than you think on in a short period of time. Another example is when a person leans back, using the other party's pull to increase the pressure on the ground, and so on. The goal is to maximize the friction on the soles of the feet in order to win the game.

What factors affect the magnitude of rolling friction.

Pressure and friction coefficient, in which pressure is the pressure perpendicular to the direction of movement of the object, and the friction coefficient is the coefficient determined by the unique properties of the object, mainly affecting the roughness of the contact surface, I hope mine can answer your question.

Static friction and kinetic friction are two different types of frictional force. When an object remains at rest with respect to another object, the force acting between the two objects is known as static friction. Whereas, when two objects are in relative motion, the force acting between the two objects is known as the mosaic or frictional force.

Static friction is the force exerted when two objects come into contact when an object is at rest. It is equal in magnitude to the external force exerted on the object but in the opposite direction to stop the object from starting to move. The magnitude of static friction depends on the roughness between the objects and the pressure between the two objects.

Kinetic friction is the frictional force that occurs when an object moves in relative motion. Its magnitude is directly proportional to the contact force between the objects. The magnitude of the spring friction force of the moving mass is generally less than the static friction force because the friction force usually decreases once the object starts moving. Debate.

It is important to note that both static friction and kinetic friction are forces related to the interaction between objects, and their magnitude and direction depend on the specific situation.

I hope I can help you, I wish you a happy life, good health, all the best, and full of happiness!

What is the difference between static friction and dynamic friction.

1. The reasons for the two are different.

Static friction is due to the tendency of one object to move relative to the surface of another non-smooth object. For example, if you hold a shovel in your hand and keep the shovel in a vertical direction, and the shovel does not slip to the ground, it is the result of static friction between the shovel and the palm of your hand. At this time, the gravitational force experienced by the shovel and the static friction force experienced by it are a pair of balancing forces.

Sliding friction is due to the relative sliding of one object on the surface of another non-smooth object. For example, in the example above, if the grip of the hand decreases to a certain level, the shovel handle will slide down the palm of the hand, and a sliding friction will be created between the shovel handle and the palm of the hand.

2. The factors affecting the size of the two are not exactly the same.

The magnitude of the sliding friction between two objects is only related to the pressure and kinetic friction factor between the surfaces of the two objects, and has nothing to do with the magnitude of other external forces. For example, on the horizontal tabletop, the force of the horizontal square grinding ear direction is used to pull the wooden block, no matter how large the pulling force, as long as the wooden block is sliding, the sliding friction between the wooden block and the horizontal table top is constant.

When two objects stacked on top of each other accelerate together at the same speed on the horizontal plane, the object above is in motion with respect to the horizontal plane, but is at rest with respect to the object below; At this time, the object above is subjected to the static friction of the object below. So the moving object can be subjected to static friction.

In the same way, if the object above remains stationary under the action of an external force (such as when it is blinded to the ceiling by a rigid connection shed), and the object below the chain is in close contact with the above and has velocity, at this time, the object above remains at rest and the object below is in motion, and there is sliding friction between them, so the object at rest can be affected by sliding friction.

Static friction and kinetic friction are two different types of friction, and their main differences are:

Definition: Static friction is the force that hinders the relative tendency of an object when it has a relative tendency to motion on the surface of another object; Whereas, kinetic friction is the force that hinders the relative motion produced by two objects in contact with each other in their relative motion.

Influencing factors: The magnitude of static friction depends on the magnitude of the force that makes the object have a relative tendency to move the chain, and its magnitude is proportional to the positive pressure between the contact surfaces, but has nothing to do with the weight of the object. The magnitude of the kinetic friction depends on the material, roughness, and positive pressure of the contact surface, and its magnitude is related to the weight of the object.

Direction of friction: The direction of static friction is opposite to the direction of the relative motion trend of the object, while the direction of kinetic friction is opposite to the direction of the relative motion of the object.

Generating conditions: The condition for static friction to arise is the presence of a relative tendency of motion between two objects, whereas the condition for generating kinetic friction is the presence of relative motion between two objects.

Effect: Static friction is often used to maintain a steady state of burning and intelligent objects, such as the static friction between the foot and the ground when walking can prevent the foot from sliding; Whereas, kinetic friction is used to hinder the relative motion of an object, for example, sliding friction can be used to slow down or change the direction of motion of an object.

In conclusion, there are obvious differences between static friction and dynamic friction in terms of definition, influencing factors, friction direction, generation conditions and effects.