Lead
What is a "metal ball"?
Is this tall object used for decoration, or does it have an important role?
Moreover, with a slight push, this "metal ball" can continue to rotate, and it does not use electricity, how does it work?
Why is there such a structure?
This kind of "metal ball" is actually a very simple parabolic trajectory to make, which is mainly composed of 3 parts, namely the transparent PVC pipe in the picture, the inner ball and the outermost iron ring.
In the clamping device, the PVC pipe should be clamped in a fixed way, and some other materials should be added to the PVC pipe.
What role will these materials play in the production process?
Among these three materials, the most important role is of course the PVC pipe, but the PVC material is transparent, so in the construction process, it should play a role in preventing the ball from flying out; At the same time, it is also necessary to ensure that the internal space must be very smooth, so that there will be a smooth operation environment.
In addition, there are the internal balls, which play a certain role while choosing a material that can be lubricated; On the outside, there are iron rings, which are designed to ensure that the trajectory of its movement is correct, and at the same time to play a decorative role.
Of the three materials, only metal and plastic are used, so the price is not too high, but its effect is amazing.
You know, this parabolic track was originally used for experiments in physics laboratories, but here, we see that it is also displayed in some shopping malls or exhibition centers, because this parabolic motion is very ornamental.
The generation of this parabolic orbit is actually to convert the motion of a straight line into a curved motion, and this change is to add a PVC water pipe in the middle, so it can convert the linear motion of the ball, so as to generate a curved path.
And this kind of ornamental sport, we can also see very common in life, that is, the roller coaster, it is through this principle that the linear motion of the ball, a certain transformation, resulting in a variety of movements.
Of course, this parabolic orbit is not only ornamental, it also has extraordinary value in teaching, and there are some other practical uses, in our daily life, how is this parabolic orbit used?
What is the use of such a parabolic orbit?
In this parabolic path, there are three most basic forms of motion, namely, upward parabolic motion, downward parabolic motion and uniform circular motion. In parabolic motion, the most typical ones are upper parabolic motion and lower parabolic motion.
In the upward parabolic motion, suppose we throw a small ball upwards from the P point holding momentum, then in the process of parabolic motion, it will first be thrown upward, and then after a certain height, it will be continuously moved downward by gravity.
In the process of parabolic motion, suppose we throw a small ball downward from point P, then in the process of parabolic motion, it will be thrown downward first, then after a certain height, it will be subjected to the action of gravity, and continue to move downward.
Of course, in a uniform circular motion, we first throw a small ball towards the P1 point, then after the first throw, the ball will continue to move in a circular motion, thus forming an orbit.
The upward parabolic motion is suitable for the design of the cam, the design of the concave wheel motion is in the Kempinski mechanism, and the uniform circular motion is widely used in the steering structure of the car.
Therefore, the designers of roller coasters designed it through the principle of this parabolic motion.
When the roller coaster is at the top of the mountain, it jumps down without thinking, and when people fall to the bottom, it will produce a feeling of beating, which is because when the falling ball on the person falls from a high place to a low place, it will cause people to experience and feel such changes.
So what is the important role of this parabola in our lives?
First of all, it plays a very important role in physical experiments, and in the process of physical experiments, in order to continuously prove some physical laws, we can conduct some experiments through this parabolic path.
In life, there are also many scenes where you can see this kind of parabolic path, take the roller coaster as an example, it is through this parabolic motion that the movement of the ball is transformed, resulting in a variety of running modes.
And in the development of disappearance, there are also many mechanical principles that are transformed through this parabola.
How does the track turn?
In this kind of "metal ball", because the orbit is a relatively simple parabolic shape, in this orbit, the ball can continue to move, which requires a certain amount of force.
Therefore, at the beginning, we need to give the ball a certain velocity, so that it can quickly pass through the P point, and after a certain change, finally maintain a high velocity.
In this process, the ball is subjected to a constant grip force, which allows the ball to constantly move on the track and form a high-altitude parabola at a certain height.
In this kind of orbital motion, the velocity of the ball, as well as its height, are constantly changing, so why can the ball constantly form motion in this kind of motion?
When the ball reaches the highest point, at this time, the effect of the ball on gravity must be the smallest, then when the velocity of the ball is greater than a certain velocity, its kinetic energy will be very large, so in order to meet its kinetic energy, it will continue to carry out the process of transferring energy to the surroundings in horizontal motion, so as to form a continuous motion.
In fact, in parabolic motion, the motion process of the ball is also a periodic motion, and compared to the motion of a period, only two positions are independent variables of the motion, namely time and angle.
Therefore, in orbital motion, the angle of the ball is exactly related to time, and if the angle is known, the corresponding time can be found.
In the process of finding angle and time, it also involves the application of certain physical laws, and similarly, some speed calculations can also be carried out through this method.
In this parabolic path, there is an entry problem, when the ball is constantly moving, due to the rotation of the earth, the ball will produce a certain deflection effect, so it should be corrected in the orbit, which involves the role of the motor in it.
When the ball is corrected on the track, this will make the ball gain a certain amount of energy, so that it will have this certain tendency, then after applying electricity, it will forcibly correct the parabolic orbit of the ball, thus forming an orbit correction effect.
How does the track turn?
We can rotate the track in many ways in ordinary times, that is, on the way to the track speed, there are mainly motor drive and manual drive.
The motor speed drive is to convert electrical energy into mechanical energy to realize the rotation of the track; The manual drive is to push the track through the power of human hands.
On the basis of no motor drive, the speed of the track will be greatly limited, and on some tracks with relatively large weight, it is more inconvenient to carry out manual drive, so the way of motor drive is usually adopted.
The track we see in life that is convenient to push is actually like the racing track in children's toys, which generally realizes the rotation of the entire track through a motor.
When the motor is used for adjustment, it is only necessary to connect the track and the motor to a certain extent, and when the motor rotates, the track can be rotated to a certain extent, so as to realize the adjustment of the track speed.
epilogue
In the parabolic track, the track is usually connected to a certain extent through the motor, and when the motor rotates, the adjustment of the track speed can be realized, so as to meet different motion needs.