What is the relative movement and what is the relative movement trend

Relative motion is the direction of motion of an object relative to another object, for example, if a wooden block moves to the right on a stationary table, then the direction of motion of the wooden block relative to the table is to the right. Relative motion tendency is the tendency of an object to move relative to another object. For example, if a wooden block is standing still on an inclined table, then it has a tendency to roll down relative to the table.

Relative motion refers to the displacement of one object relative to another. All motion is relative, just as there is no absolute stillness. Relative motion tendency refers to the tendency of one object to move relative to another object (about to move but has not started or wants to move but for some reason does not move, such as a wooden block pressed against a vertical wall, which has a relative motion tendency for the wall).

Ask the physics teacher to explain it more clearly and understandably.

The differences are as follows:

1. The relative motion is relative to the movement of the contact surface.

2. The relative movement trend is stationary with respect to the contact surface.

3. Relative motion refers to the continuous change of the relative position of an object to another object, that is, the motion of this object relative to the reference frame fixed on the second object, and Newton's laws of motion only apply to the inertial frame of reference.

Through coordinate transformation, the known motion law relative to the inertial coordinate system is transformed into the motion law relative to the non-inertial coordinate system.

Write the differential equation of motion relative to the non-inertial coordinate system under investigation and then find the integral.

In this case, if you want to take advantage of the form of Newton's second law, you must attach an inertial force to the force acting on the particle.

4. The so-called relative motion trend is to want to have relative motion, but there is no actual relative motion, more precisely, the moment without relative motion is the moment when the relative velocity is zero, and the moment when there is relative motion is the moment when the relative velocity is not zero.

According to the concept of acceleration, in the process of thinking about relative motion, two objects must have relative acceleration, so the relative motion trend refers to the relative acceleration, and the magnitude of the trend refers to the relative acceleration.

Secondly, it is also necessary to clarify the concept of kinetic acceleration, which refers to the acceleration to the ground caused by the resultant force of all external forces on the object in the desired direction except static friction.

The position of one object relative to another object changes with time, then this object moves towards another object, and this object is inRelative movement is changeableThe status.

If their positions do not change with time, the object is at relative rest. Thus seepage, rest and motion are both relative concepts, with the object relative to the selected reference.

Relate. Problem: In Figure 1 and Figure 2, the surface of objects A, B, C, and D is known, and Ab and Cd are relatively stationaryStatic frictionrole, if any, please determine its direction.

Solution: Assuming that the contact surfaces of the two objects are smooth, if the objects are in relative motion, the direction of the relative motion trend between the objects is the same as the direction of the relative motion, so that the direction of static friction can be determined.

Fig. 1: Assuming that the surface between AB is smooth, A will slide diagonally downward along the surface of B, so it can be determined that A has a downward tendency with respect to B, so that the direction of static friction experienced by A is oblique downward.

Figure 2: Assuming that the surface between the CDs is photo-slip and C does not move along the D surface, there is no relative movement trend between the CDs, so there is no static friction.

The so-called "relative movement tendency" is to want to have relative motion, but there is no actual relative motion. To be more precise, the moment when there is no relative motion is the moment when the relative velocity is zero, and the moment when there is a relative motion is the moment when the relative velocity is not zero. According to the concept of acceleration, in the process of thinking about relative motion, two objects must have relative acceleration, so the relative motion trend refers to the relative acceleration, and the magnitude of the trend refers to the relative acceleration.

Relative motion is relative to the motion of the contact surface;

The relative movement tendency is that it is stationary with respect to the contact surface.

The relative motion of an object means that the object is in a special state that wants to move but does not move.

Relative motion.

The difference between the BAI and the relative movement trend: the former is relative.

The contact surface is moving, and the post-dao is stationary with respect to the contact surface. An object has a tendency to move relatively, which means that the object is in a special state that wants to move but does not move.

The position of one object relative to another object changes with time, then this object is in motion towards another object, and this object is in relative motion.

The relative motion is already in motion, and the object does not need to be in contact. For example, if you are at point A, and someone is at point B, and he moves inside, and you see that he has a displacement, and he also sees that you have a displacement, this is relative motion.

Whereas, the relative movement trend generally refers to the movement trend with contact. For example, if a very heavy table is placed on the ground, and someone pushes it but can't push it (in fact, the static friction of the ground balances the thrust), which is called the relative movement trend.

There is a tendency towards relative motion in the conditions under which static friction is generated.

There is relative motion in the conditions in which sliding friction is generated.

1 Relative motion is the motion between two objects, for example, if you stand on a train and see another train moving quickly, you see the speed of the other train relative to the speed of your train!

2. Movement trend refers to the trend of the object to move in which direction, if someone pushes you forward, you are still standing, but you have a tendency to move forward, not moving!

Assuming that the contact surface is smooth, it is said that the relative motion tendency is to see which way the object has a tendency to move.

You push the table, the table has no movement, but there is a tendency to move, you push the table to move, the table has a relative motion relative to the ground, and it will move without friction, but in reality there is no motion, the object has a relative motion tendency, and the direction of static friction is opposite to the direction of the relative motion trend.