The up and down motion of a basketball above the ground is not a mechanical vibration

The reciprocating motion of an object (or part of an object) on both sides of a central position is called mechanical vibration, often referred to simply as vibration. Mechanical vibration is a type of mechanical motion that is a special motion that is different from the various motions that have been learned before.

For example, the motion of the following objects is mechanical vibration: the ball moves back and forth between two smooth inclined planes; Hang a small ball with a line, and the ball swings in a vertical plane (single pendulum); Wooden blocks move up and down the surface of the water; Hitting the drum, the undulating movement of the eardrum, and so on.

Characteristics of mechanical vibration: First, there is a "central position" (often called "equilibrium position"), which is also where the object is located when it stops moving. For example, if you pull the ball away and then let go, the ball will vibrate left and right near the balance position, and after many repetitions, it will finally stop in the balance position.

The second characteristic of vibration, the reciprocating nature of motion, is the biggest characteristic of vibration.

The conditions for the generation of mechanical vibration are: first, whenever the object leaves the equilibrium position, it will be affected by the restoring force, which is also the force characteristic of the vibrating object; Second, the resistance is small enough. If the resistance is high, the object cannot vibrate, such as a pendulum pendulum in water or in a very sticky oil, and the resistance is very high, so there is almost no vibration.

so，the answer is no

No, mechanical vibration just reciprocates around a balanced position, and basketball does not have a balanced position.

No, the mechanical vibrations are reciprocating, and the basketball stops after a while!

First of all, it is necessary to understand what mechanical vibration is: under the action of restoring force, reciprocating motion near the equilibrium position, that is, mechanical vibration; The former is free motion, which can be understood as no external force to produce energy consumption, and can be reciprocating near the equilibrium position; The latter, on the other hand, has energy consumption, and the distance of movement will be shorter and shorter each time, and eventually it will stop, not a mechanical movement.

Yes, it is a mechanical movement. Mechanical motion is the simplest and most basic form of motion in nature. In physics, the process by which the position of an object in relation to another object, or the position of some parts of an object relative to other parts, changes over time is called mechanical motion.

It depends on what form of vibration you are talking about, and it can be classified as mechanical motion by achieving a specific requirement through a specific motion mechanism, such as a vibrating screen;

The other is the vibration caused by the resonance of the surrounding objects due to the movement of the machine, such as the motor is not firmly fixed or the rigidity of the fixed position is insufficient, resulting in the base vibrating with the motor, I hope it will be useful.

The vibration of mechanical motion is only one type of vibration, and there are also non-mechanical movements --- electromagnetic vibration.

En, the right thing is physical motion.

Mechanical vibrations do not necessarily produce mechanical waves (and a medium), but mechanical waves must be generated by mechanical vibrations

1. Mechanical vibration is the premise (or condition) for the generation of mechanical waves. Because the generation of mechanical waves requires two conditions: vibration source, vibration and propagation medium. This "vibration source" is the mechanical vibration of the object.

A mechanical wave is the vibration of the vibration source that drives the vibration of the nearby particles, and then drives the vibrations of the farther particles, thus forming a wave. Mechanical waves are the propagation of vibrations in the form of vibrations, as well as the propagation of information and energy (because vibrations contain both).

2. Mechanical vibration may not be able to produce mechanical waves (but also a medium), but mechanical waves must be generated by mechanical vibrations.

The farthest point of the piston top from the crankshaft center of rotation is (top dead center), and the closest point of the piston top to the center of crankshaft rotation is (bottom dead center).

To put it bluntly, it's the upper and lower vertices, and as for what you say: "the piston moves up until it's about to move down", this generally refers to the four strokes or valve opening and closing moments during operation.

The easiest way is to remove a cylinder of spark plugs, then use a long screwdriver or welding rod to put into a cylinder, turn the crankshaft, and the screwdriver will slowly rise up, and the highest point is the top dead center!

Vibration is also a type of motion, and the latter includes the former.

The definition of vibration is the equilibrium position in which an object passes through it.

Back to the back and forth.

Answer, or the movement of a physical quantity around its equilibrium value.

The apparent definition of the old classical mechanics: motion is a change in the spatial position of a moving object.

The latter is understood more towards the overall concept of macroscopic and low-velocity, and the vibration appears to be more microscopic.

Well, that's my understanding =. =

Mechanical motion - the change of the spatial position of the complex object.

Mechanical motion comes in many forms, such as uniform motion, circular motion, vibration, .......

Vibration is a manifestation of mechanical motion.

Vibration is characterized by the reciprocating motion of an object in the vicinity of a certain position (such as a basketball).

Movement – including mechanical movement, thermal movement, ,......It is a wide name.

Vibration is a type of motion, and vibration is a reciprocating motion near the equilibrium position.

ht Chapter XI.

Mechanical vibration. Training.

Simple harmonic movement. Conceptual Regularity Group.

The following movements are classified as mechanical vibrations.

The table tennis ball moves up and down freely back and forth on the ground.

The spring oscillator moves up and down in the vertical direction.

Swing. Movement back and forth in the air.

The up-and-down motion of a cylindrical glass bottle standing upright on the water. abcd

Regarding the displacement and equilibrium position of mechanical vibration, the following statement is true.

aThe equilibrium position is the center of the vibration range of the object.

bThe displacement of mechanical vibration is always the displacement starting from the equilibrium position.

cThe greater the distance traveled by the mechanically vibrating object, the greater the displacement that occurs.

dThe displacement of mechanical vibration refers to the displacement of the vibrating object when it deviates the furthest from the equilibrium position.

Fig. Fig. A because the vibration image can be directly obtained by experiments, the vibration image is the trajectory of the actual motion of the oscillator.

The b-vibration image reflects the law of the oscillator displacement with time, not the actual trajectory of the oscillator's motion. c oscillator in.

The displacement at position b is the curve.

The length of the BC.

d oscillator movement to.

The direction of velocity at point b is the tangent direction of that point.

The following statements about this image are correct.

aThe coordinate origin of the image is established in the equilibrium position of the spring oscillator.