Is an object in the balance of two forces subject to friction?

The balance of two forces has nothing to do with the frictional force or not.

If on the horizontal plane, the object at rest has been subjected to a pair of equilibrium forces other than the frictional force, it is no longer subject to some other force, including friction, otherwise it is not in equilibrium and cannot be at rest.

If one of the pairs of equilibrium forces is friction, the other force and it are equilibrium. It is subject to friction.

An object with a two-force balance has no tendency to move in the direction of the equilibrium force, and there is no frictional force.

The number of revisions is "capped"!

Nothing to do with "static friction"!

Static friction: The kinetic force between objects is unbalanced, and the frictional force at rest is the balance of dynamic force and friction.

Your teacher is right.

There is no friction when the force is balanced.

In a mechanical system, equilibrium refers to an inertial frame of reference.

Internally, the object is acted upon by several forces and remains at rest, or moves in a straight line at a uniform speed.

The state, or the state of rotating at a constant speed around the axis, is called the state of equilibrium of the object, which is referred to as the "equilibrium" of the object.

If an object can remain at rest or move in a straight line at a uniform speed when it is subjected to two forces, we say that the object is in equilibrium. The two forces that keep an object in equilibrium are called equilibrium forces.

The object is subjected to a balanced force, and the net force is 0, as if there is no force, and it can be approximated to satisfy Newton's first law.

Condition. Two forces acting on the same object, if the object remains at rest or in a uniform linear motion, then the effects of the two forces cancel each other out (the net force is 0), and we say that the two forces are balanced.

Whereas, frictional force refers to hindering the relative motion of an object.

or relative movement tendency). Its direction is opposite to the direction of the object's relative motion (or relative motion tendency).

Friction is divided into static friction.

There are three types of rolling friction and sliding friction. Sliding friction.

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

Forcefully push the object against a vertical and smooth wall, there is friction, which is the friction between the object and the thing on top, put the object on a belt that rotates at a uniform speed to keep it stationary, there is no friction, there is no tendency to relative motion.

There is also friction when the force is balanced.

For example, when the tension force and the friction force are balanced forces with each other.

Are friction and pull a balancing force? Possibly, it is.

Let's start with the definition of a pair of equilibrium forces. Two forces acting on the same object. If they are equal in size and opposite in the opposite direction, act on the same straight line.

Then this is a pair of equilibrium forces. Other words. The resultant force of these two forces is equal to zero.

Thus we can get the state of motion of the object, which must be stationary or uniform linear motion.

Therefore. An object placed on a horizontal surface. Pull him with a horizontal force f.

Go and call this f a pull. A pull force is a force named after an effect. Friction is the force that hinders the movement due to friction between an object and a horizontal plane.

If the object is at rest with a horizontal plane, or if it is moving in a straight line at a uniform speed. Then, the tensile force and the frictional force must be equal in magnitude and opposite directions, acting on the same straight line. Then the pulling force and the frictional force become a pair of balancing forces.

Equilibrant. Tension and friction are a pair of balancing forces. The size is equal and the direction is opposite.

The pulling force must be greater than the frictional force. If the object moves slowly, moves in a straight line at a uniform speed, or does not move at rest, then the friction and tension at this time are a pair of equilibrium forces, and if the object is in accelerated motion or irregular motion, it is not a pair of equilibrium forces.

Are friction and tension a pair of balancing forces? If the object is moving slowly, moving in a straight line at a constant speed, or not moving at rest, the friction and tension at this point are a pair of equilibrium forces. If an object moves in accelerated or irregular motion, it is not a pair of equilibrium forces.

If the object moves slowly, moves in a straight line at a uniform speed, or is not moving at rest, then the friction and tension at this time are a pair of equilibrium forces, and if the object is in accelerated motion or irregular motion, it is not a pair of equilibrium forces.

If the tension and friction are equal in magnitude and opposite directions, they are equilibrium forces. If the size is different, the direction is also different.

Summary. In the experiment of Newton's second law, the power is generally played by hanging a heavy object, that is, the pulling force on the trolley is equal to the gravitational force of the heavy object.

If the friction is not balanced, it will be impossible to control the forces experienced by the trolley. The combined external force is not equal to the pulling force. As a result, it is impossible to draw the right conclusions.

What is the role of balancing friction and why it is important to balance friction.

In the experiment of Newton's second law, the power is generally played by hanging a heavy object, that is, the pulling force on the trolley is equal to the gravitational force of the heavy object. If the friction is not balanced, it will be impossible to control the forces experienced by the trolley. The combined external force is not equal to the pulling force.

As a result, it is impossible to draw the right conclusions.

Please give a thumbs up, oh thank you.

The two-force equilibrium principle assumes that there is no interference from other external forces between all objects and systems. Therefore, the two-force balance is only suitable for cases where friction is not considered. Ignoring friction, it can be assumed that there is no mutual resistance between the objects and that the motion of all objects is completely free.

In fact, friction is unavoidable. Regardless of the situation, there is friction and it is caused due to the roughness between the surfaces of the objects. The amount of friction depends on a variety of factors, such as the material of the two surfaces, the contact area, the pressure, the relative velocity, etc.

In the real world, the friction between objects is usually a large factor that can have a direct and indirect effect on the relative motion and balance of objects.

However, ignoring friction can greatly simplify problem analysis, especially in teaching and research. Therefore, when friction is ignored, idealized assumptions can be employed to study and solve the problem; However, in practice, it is also necessary to take into account the effects of friction. Therefore, in practical problems, friction is very important, affecting the balance and motion of the head sum of objects.

Friction and tension are balancing forces. When the object moves at a uniform speed or stands still (the initial state is also stationary and the force is balanced), the external force is static friction. Therefore, the tension and friction are balanced forces.

The force that hinders the relative motion of an object (or the relative motion macro-travel tendency) is called friction. The direction of friction is opposite to the direction of the relative motion (or relative tendency of motion) of the source object. Frictional ballast force is divided into three types: static friction, rolling friction, and sliding friction.

According to Newton's first law, the net force equal to zero is also equivalent to the object not being acted upon by external forces, so the tension force and friction force are a pair of equilibrium forces.

This is indeed a problem of Qingshen, pushing the table, although the thrust and friction are on the same object, but it is true that the rent is not on the same straight line, this can be discussed with your physics teacher.

Because the friction is not fully balanced or the inclination angle is too large when the friction is balanced, the friction is balanced to simulate the ideal environment so that the force completely acts on the object to reduce the error.

If the unbalanced friction force of Moxiang will have a part of Mu Xun to overcome the friction, the data that affects the actual value is not real, because a part of the force to overcome the friction, the actual force of acceleration is small, and the data obtained is small, which cannot meet the experimental requirements.

In the experiment of "studying the linear motion of uniform variable speed", the law of the change of speed with time was studied in the air, and there was no need to balance the friction.

The linear motion of an object at uniform variable speed must meet both of the following requirements:

1) The combined external force is not zero and remains unchanged;

2) The resultant external force and the initial velocity are in the same straight line.

**When the linear motion law of uniform speed is uniform, it is only necessary to ensure that the external force remains unchanged, and the friction force in this experiment is a constant force, which will not affect the external force to make it change.