Physical friction The superposition of objects, the frictional force between two objects

In this case, it is possible to analyze whether there is a relative motion or a tendency to relative motion between two objects or between the object and the ground. If the two are moving relative to each other, then of course there is friction (unless it is indicated as a smooth plane).

If there is a tendency towards relative motion, then there is friction as well. If there is neither of the above, it does not exist.

Just grasp the stressed object and the movement trend of the object. Friction is what prevents the movement of an object.

No points, no motivation. Let's keep it simple.

a.Right. b.There is a force f ab that stands still, that is to say, there must be a force acting on a in the opposite direction equal to f magnitude. Wrong.

At rest, B is only subjected to gravity, so there is no friction between AB. Wrong.

d.Right.

Let's be specific.

A&DIf there is friction between A and B, B will not be balanced.

A Everything else is wrong I got a perfect score of 4 times in a row in the physics exam. With the integral method a b the object is seen as one according to the balance of 2 forces to know the correct cTake b as the object of study, also according to the balance of 2 forces, c d is obviously wrong, through this topic, it can be seen that your physics foundation is really poor, the key to learning physics well is interest, very careful thinking, this is not what we can give you in a few words, the most effective advice is to buy a physics book with a detailed explanation, to study deeply, once you learn it, you will find that everything is very simple.

Answer: Ad is subjected to static friction f because a is stationary under the action of the tensile force f, but there is a tendency to move relatively

There is no force between A and B, and there is no relative movement tendency, so there is no friction.

Consider the ab2 objects as a whole by the pull of the horizontal right five bulls and the horizontal right four bulls respectively. Because AB is at rest as a whole, it can be known that the system as a whole is thin to the ground. The static friction of a bull to the left horizontally.

So it can be known that the C answer is correct. Then separate B and A. Consider it individually. Perform a force analysis.

Then the friction between AB can be known to be equal to four ox. A has a static friction of four bulls horizontally to the left against B.

Answer: This question uses physics knowledge such as "the balance of forces on stationary objects", "the equilibrium force is equal", and "the interaction force is also equal".

As long as the horizontal force balance is analyzed, the result can be obtained:

If the above object A is at rest, then A is balanced horizontally by a pulling force f to the left and a static friction force to the right exerted by object B. So, f = f = 4n

Since the action of the force is reciprocal, A also exerts a leftward static friction force on B, which is also 4N.

b is balanced by three forces in the horizontal direction, so that the ground has a static friction force of 1n to the left on b.

The friction between AB can only be analyzed A, and A is at rest indicating that the force is balanced, and the frictional force is equal to the magnitude of F1 in the opposite direction.

When it doesn't move: the friction below is in the opposite direction to the force it is experiencing Moving, relatively stationary: The friction above is in the opposite direction of motion Remember, the friction is in the opposite direction of the force, and it is to keep the object as stationary as possible.

There are two overlapping objects on the ground, and now the one below is pulled to the right with a force of 10n, (the two objects move in a uniform straight line to the right at the same time, and the two objects remain relatively stationary all the time, regardless of the air resistance) Find the force on the object above (if the force is applied, find the magnitude, if not, tell the reason), then find the force on the object below, and find the friction force on the ground against the object below? I read that the reference book says that the friction of the object above is 0n, and the friction of the ground against the object below is 10n.

An object is superimposed on another object, and if one of the objects below is subjected to a force and does not move, the object below is subjected to static friction, and the object above is not subject to friction but only gravity and support.

If it moves, if the upper and lower objects are relatively stationary, but the lower objects are subject to sliding friction, and the upper objects are still not subjected to force.

In relative motion, both are subjected to sliding friction, two on the object below, and one on the object above.

If the object above is subjected to force.

First question.

Both objects are subjected to static friction.

Second question.

The upper and lower objects are subject to friction, the upper one is subject to static friction, and the lower one is subject to static friction, one static friction and one dynamic friction.

The third question is the same as the third answer to the previous question.

Let the upper block be f1, the lower block be f2, the friction between blocks f1, and the ground friction f2

1) The tensile force is in the same direction, if it is in a smooth horizontal plane, f1>f2, f=f1-f2f1

Summary. The friction between overlapping objects refers to the force generated at the point where two objects come into contact with each other's surfaces when they squeeze or slide against each other. In physics, transverse friction, also known as viscous friction or modulus friction, is a force that prevents an object from moving in a relatively sideways direction.

The magnitude of the transverse friction depends on the roughness of the surface of the object, the contact area, and the surface properties. In addition, the lateral friction force is also affected by the vertical pressure between the objects (perpendicular to the contact surface). Transverse friction is used in a wide range of applications, such as braking systems, motion devices, and lubricating materials.

I'm still a little confused, can you be more detailed?

The friction between overlapping objects refers to the force generated when two objects touch each other's surfaces when they squeeze or slide against each other. In physics, transverse friction, also known as viscous friction or modulus friction, is a force that prevents an object from moving in a relatively sideways direction. The magnitude of the transverse friction depends on the roughness of the surface of the object, the contact area, and the surface properties.

In addition, the lateral friction force is also affected by the vertical pressure between the objects (perpendicular to the contact surface). The application of transverse friction is widely speculated, such as the influence of transverse friction in braking systems, motion devices and lubricating materials.

Summary. Hello, it is a pleasure to serve you and give you the following answer: The clinging friction of different objects is different because of their different surface structures and materials.

To solve this problem, we must first determine the amount of friction, and then choose the appropriate friction agent according to the actual situation. Steps:1

First of all, to determine the magnitude of friction, a friction measuring instrument can be used to measure friction. 2.Then, according to the amount of friction, choose the appropriate friction agent.

In general, the greater the friction, the greater the viscosity of the friction agent. 3.Finally, the friction agent is applied to the surface of the object to reduce the friction force, so as to achieve the purpose of reducing the friction force.

Personal Tips:1When using friction agents, it is necessary to pay attention to the viscosity of the friction agent in order to choose the right friction agent.

2.When applying the friction agent, it should be applied evenly so as not to affect the effect of reducing the friction force. 3.

When using friction agents, it is necessary to pay attention to safety to avoid accidents.

Hello, it is a pleasure to serve you and give you the following answer: The clinging friction of different objects is different because of their different surface structures and materials. To solve this problem, we must first determine the amount of friction, and then choose the appropriate friction agent according to the actual situation.

Steps:1First of all, to determine the magnitude of friction, a friction measuring instrument can be used to measure friction.

Huai buried 2Then, according to the amount of friction, choose the appropriate friction agent. In general, the greater the friction, the greater the viscosity of the friction agent.

3.Finally, Sui Ming applies the friction agent to the surface of the object to reduce the friction and lead the lead to reduce the friction. Personal Tips:

1.When using friction agents, it is necessary to pay attention to the viscosity of the friction agent in order to choose the right friction agent. 2.

When applying the friction agent, it should be applied evenly so as not to affect the effect of reducing the friction force. 3.When using friction agents, it is necessary to pay attention to safety to avoid accidents.

Can you add, I don't quite understand it.

Hello, it is a pleasure to serve you and give you the following answer: The clinging friction of different objects is different because of their different surface structures and materials. To solve this problem, we must first determine the amount of friction, and then choose the appropriate friction agent according to the actual situation.

Steps:1First of all, to determine the magnitude of friction, a friction measuring instrument can be used to measure friction.

Huai buried 2Then, according to the amount of friction, choose the appropriate friction agent. In general, the greater the friction, the greater the viscosity of the friction agent.

3.Finally, Sui Ming applies the friction agent to the surface of the object to reduce the friction and lead the lead to reduce the friction. Personal Tips:

1.When using friction agents, it is necessary to pay attention to the viscosity of the friction agent in order to choose the right friction agent. 2.

When applying the friction agent, it should be applied evenly so as not to affect the effect of reducing the friction force. 3.When using friction agents, it is necessary to pay attention to safety to avoid accidents.

Hello, it is a pleasure to serve you and give you the following answer: different objects have different friction forces. The friction depends on the roughness of the surface of the object, the material of the object, and the contact area between the objects.

To solve this problem, it is first necessary to determine the material of the object, then to check the surface roughness of the object, and to determine the contact area between the objects and the collapse. If the surface roughness of the objects varies, sandpaper or other abrasive tools can be used to smooth the surface to reduce friction. If the material of the object is different, lubricants can be used to reduce friction.

If the contact area between the objects is different, a spacer or other pad can be used to increase the contact area to reduce friction. Personal tip: When solving friction problems, carefully inspect the material, surface roughness and contact area of the object in order to find out the cause of friction and take appropriate measures to reduce friction.