CN201607852U - A uniform linear motion demonstrator - Google Patents

Abstract

The utility model discloses a demonstrator of uniform linear motion of an object, which comprises: a rubber plug, a slender glass tube, iron balls, and a permanent magnet; the rubber plug seals the inner cavity of the slender glass tube, and the inner cavity is filled with a viscosity coefficient of 0.1-0.8 The liquid between PaS, the iron ball is set in the slender glass tube to move freely, and the permanent magnet is set at the outer end of the slender glass tube. The experimental device is simple and delicate, the operation is convenient and fast, and the success rate is high. The small ball in the liquid is refracted and magnified by the glass tube filled with the liquid, which is clear and bright, and has high visibility, so it is especially suitable for teaching demonstration experiments.

Description

A uniform linear motion demonstrator

technical field

The utility model relates to a physical experiment device, in particular to a uniform linear motion demonstrator for demonstrating the uniform linear motion of an object.

Background technique

Uniform linear motion is the simplest mechanical motion of an object. In middle school physics teaching, it is the basis for learning the mechanical motion of objects. Students are required to have a deep understanding of this concept, observe and master its movement characteristics, in order to learn the follow-up courses well. Therefore, in teaching, demonstration experiments are often combined with lectures to achieve good teaching results.

The principle of the existing object uniform linear motion demonstrator is to study whether the distances passed in equal time are equal. Generally, a metronome is used to time the time, find out the position of the moving object when the beat sounds, and then obtain the characteristics of uniform linear motion. This process must control the speed of the object.

There are two existing experimental methods: one is to demonstrate with chute guide rails and small balls, which needs to consider balance friction and air resistance; the other is to demonstrate with a flat plate and a trolley with pulleys at the front, and the speed of movement is more difficult to control, so Every time an experiment is done, it is necessary to make multiple adjustments and experiments in order to succeed according to the environment of different locations, which is time-consuming and laborious, and affects teaching.

Contents of the invention

The purpose of the utility model is to provide a demonstrator for the uniform linear motion of an object, so as to demonstrate the uniform linear motion of the object without adjustment and with high success rate.

The purpose of this utility model is achieved by the following technical solutions:

A demonstrator of uniform linear motion of an object, comprising: a rubber plug, a slender glass tube, an iron ball, and a permanent magnet; the rubber plug seals the inner cavity of the slender glass tube, and the inner cavity is filled with a liquid with a viscosity coefficient between 0.1-0.8PaS. The small iron ball is arranged in the slender glass tube and can move freely, and the permanent magnet is arranged at the outer end of the slender glass tube.

Described liquid is machine oil, castor oil or salad oil.

The walls of the elongated glass tubes are provided with scales.

It can be seen from the above technical solution provided by the utility model that the uniform linear motion demonstrator provided by the embodiment of the utility model has a simple and exquisite experimental device, convenient and quick operation, and a high success rate. The small ball in the liquid is refracted and magnified by the glass tube filled with the liquid, which is clear and bright, and has high visibility, so it is especially suitable for teaching demonstration experiments.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a demonstrator of uniform linear motion of an object provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a demonstrator of uniform linear motion of an object, rubber plug 3, slender glass tube 1, iron ball, permanent magnet 4; rubber plug 3 seals the inner cavity of the slender glass tube 1, and the inner cavity is filled with viscosity For liquids with a coefficient between 0.1-0.8PaS, the iron ball 2 is set in the slender glass tube to move freely, and the permanent magnet 4 is set at the outer end of the slender glass tube.

The liquid in this example is machine oil, castor oil or salad oil, and the salad oil is general edible salad oil and just can satisfy the requirement.

In addition, a scale 5 may be provided on the wall of the elongated glass tube 1 to facilitate measurement. If there is no scale in use, it is necessary to use other instruments with scales for assistance.

working principle

At the beginning, the iron ball 2 is located at one end of the tube with the permanent magnet 4, the slender glass tube 1 is placed vertically, the permanent magnet 4 is removed, and after the iron ball 2 slowly falls for about 1 second, the iron ball The ball moves at a constant speed, and along with the beating sound of the metronome, the scale 5 on the wall of the slender glass tube 1 is read, and the scale value of the falling position of the iron ball 2 is recorded. It can be seen from the recorded scale values that during the falling process of the iron ball 2, the distances passed in equal time intervals are equal, so it is a uniform linear motion.

If there is no scale on the tube wall of the slender glass tube 1, a vertical line can be drawn on the blackboard, and the slender glass tube 1 is close to the vertical line so that the iron ball 2 is positioned at the end of the permanent magnet 4 in the tube, and the The long glass tube 1 is placed vertically, and the permanent magnet 4 is removed. After the iron ball 2 falls slowly for about 1 second, the iron ball enters a uniform motion. The position where the iron ball 2 falls. It can be seen from drawing the falling position of the iron ball 2 that during the falling process of the iron ball 2, the distances passed in equal time intervals are equal, so it is a uniform linear motion.

If you want to change the falling speed of the iron ball 2, you can place the glass tube obliquely, then the falling speed of the iron ball 2 will slow down, and the distance passed in the same time will be shortened. The slower the falling speed of the ball 2, the falling speed of the iron ball 2 can be controlled at will, but it still moves in a straight line at a uniform speed, so the experiment is very convenient.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (3)

1. an object uniform linear movement demonstration device is characterized in that, comprising: plug, slender glass tube, irony bead, permanent magnet; Plug sealing slender glass tube cavity, inner chamber is full of the liquid of viscosity coefficient between 0.1-0.8PaS, but the irony bead is located at free movement in the slender glass tube, and permanent magnet is located at the slender glass tube outer end.

2. object uniform linear movement demonstration device according to claim 1 is characterized in that, described liquid is machine oil, castor oil or salad oil.

3. object uniform linear movement demonstration device according to claim 1 is characterized in that, described slender glass tube wall is provided with scale.

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