CN103903502A - Intermolecular force action model - Google Patents
Intermolecular force action model Download PDFInfo
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- CN103903502A CN103903502A CN201210596172.0A CN201210596172A CN103903502A CN 103903502 A CN103903502 A CN 103903502A CN 201210596172 A CN201210596172 A CN 201210596172A CN 103903502 A CN103903502 A CN 103903502A
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Abstract
The invention relates to a teaching aid for demonstration of the relationship between intermolecular acting force and the distance, in particular to an intermolecular force action model. The intermolecular force action model is composed of a center pole, a fixed ball and a movable ball, wherein the center pole is of a partially hollow tubular structure, the fixed ball is fixedly installed on one side of the center pole, a cylindrical powerful magnet is installed in the side, where the fixed ball is fixedly installed, of the center pole in a sleeved mode, the movable ball is installed on the other side of the center pole in a coaxially sliding and sleeved mode, an annular powerful magnet is embedded in the movable ball, and the two ends of the center pole are respectively provided with an anti-falling end cap. The intermolecular force action model can be used as the teaching aid for physics in junior high schools and senior high schools and can correctly simulate the relationship between the intermolecular acting force and the distance; moreover, the demonstration effect is obvious, the structure is simple, and operation is convenient.
Description
Technical field
The invention belongs to teaching aid field, particularly relate to a kind of teaching aid---the intermolecular force action model of intermolecular acting force with distance relation of demonstrating.
Background technology
At present, in teaching, demonstrate intermolecular acting force heel distance from the teaching aid of relation still belong to blank.In the teaching of " intermolecular interaction force " one joint, due to intermolecular acting force heel distance from relation very abstract, student only has abstraction cognition and there is no perceptual knowledge, therefore brings certain difficulty to teaching.For inspiring student's cognition, known junior physics textbook, high school physics teachers ' teaching are with all pointing out in book, can liken intermolecular interaction force with the elastic force of two Interglobular springs, elastic force is equivalent to making a concerted effort of intermolecular attraction and repulsion, i.e. practical manifestation intermolecular interaction force out.But, there is wretched insufficiency part in this metaphor: in the time of two ball wide aparts, not " it is very faint that acting force just becomes; can ignore ", but along with the elongation of spring, the gravitation showing is increasing, this and intermolecular acting force heel distance from be related to grave fault, be very easy to the correct understanding of mislead students to intermolecular interaction.
Summary of the invention
The object of the invention is to fill up the blank of " intermolecular interaction force " demonstration teaching aid, a kind of intermolecular force action model is provided, this model utilizes the interaction force between the interaction force model molecule between magnetic pole, demonstration intermolecular acting force heel distance from be related to time, demonstration effect identical with intermolecular acting force.
The present invention solves its technical matters and is achieved through the following technical solutions:
A kind of intermolecular force action model, it is characterized in that: by center-pole, determine ball and moving ball forms, center-pole is part hollow tubular structure, one side is fixedly mounted with certain ball, in center-pole, be set with a cylindrical strong magnets, the coaxial slip cap of opposite side is equipped with a moving ball, is embedded with an annular strong magnets in this moving ball, and center-pole two ends are shaped with respectively an anticreep end cap.
And, described determine ball, moving ball by left hemisphere and right hemisphere diametrically mutually setting-in form.
And described cylindrical strong magnets, annular strong magnets all stick with glue agent and are cemented in corresponding site.
And, the powerful magnetic sheet of the replaceable one-tenth of described annular strong magnets or magnetic shoe.
Advantage of the present invention and beneficial effect are:
This intermolecular power action model is to be fixedly mounted with certain ball in center-pole one side, in the center-pole of determining ball one side, fix a cylindrical strong magnets being fixedly mounted with, the moving ball of opposite side coaxial package one, in moving ball, fix an annular strong magnets, make ball can on center-pole, be free to slide to change the distance between two balls.In the time of two ball close proximity, between two balls, show as repulsion, distance is less, and repulsion is larger; Two balls have an equilibrium point at a distance of time slightly far away, and now repulsion and gravitation reach balance; Two balls show as gravitation apart from continuing while increase, and along with the increase of distance, and this gravitation first increases and then decreases until become very faint, can be ignored.Realized demonstrate intermolecular acting force heel distance from the object of relation.The present invention can be used as the physics teaching aid of junior middle school, senior middle school, the acting force heel distance between correct model molecule from relation, and demonstration successful, simple in structure, easy to operate.
Accompanying drawing explanation
Fig. 1 is schematic cross-section of the present invention;
Fig. 2 is the moving ball cross-sectional view of the present invention;
Fig. 3 is the moving ball cross-sectional view of second embodiment of the invention;
Fig. 4 is the schematic cross-section of third embodiment of the invention;
Fig. 5 is the moving ball cross-sectional view of third embodiment of the invention;
Embodiment
Below by specific embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
Embodiment 1:
A kind of intermolecular force action model, by center-pole 7, determine ball 9 and moving ball 8 forms, wherein center-pole is part hollow tubular structure, one side is fixedly mounted with certain ball, this determine ball by left hemisphere 1 and right hemisphere 2 diametrically mutually setting-in formed, in the center-pole of determining ball one side, be set with a cylindrical strong magnets 3 being fixedly mounted with, the coaxial slip cap of opposite side is equipped with a moving ball, this moving ball by left hemisphere 5 and right hemisphere 6 diametrically mutually setting-in formed, in moving ball, be embedded with an annular strong magnets 4, two strong magnets all stick with glue agent and are cemented in corresponding site, be shaped with respectively an anticreep end cap 10 at the two ends of center-pole.
Embodiment 2:
Just the moving ball left hemisphere of narrating in embodiment 1 is replaced to the moving ball left hemisphere 11 in cross section as shown in Figure 3, annular strong magnets wherein replaces to powerful magnetic sheet 12.
Other are same as embodiment 1.
Embodiment 3:
Just the moving ball left hemisphere of narrating in embodiment 1 is replaced to the moving ball left hemisphere 13 in cross section as shown in Figure 4, annular strong magnets wherein replaces to powerful magnetic shoe 14.
Other are same as embodiment 1.
Principle of work of the present invention is:
The principles of science of foundation is the interaction principle between magnetic pole---two like magnetic poles repel each other, there is a natural attraction between the sexes.This principle can be described by the relation between the magnetic line of force: in the time that two magnetic poles are mutually close, two magnetic poles line of force directions are identical, between two magnetic poles, show as gravitation; Two magnetic poles line of force opposite directions, show as repulsion between two magnetic poles.The magnetic line of force opposite direction of the magnetic line of force in ring-shaped magnet plane and central hole, in the time that bar magnet one end penetrates to ring-shaped magnet center pit, because both magnetic lines of force are existing equidirectional, also have reciprocal, therefore, existing gravitation also has repulsion between the two, and gravitation and repulsion exist simultaneously.Along with the variation of distance between the two, the size of gravitation and repulsion also can change.In the time that repulsion is greater than gravitation, make a concerted effort to show as repulsion; In the time that repulsion equals gravitation, make a concerted effort to show as zero; The two is relatively static, is an equilibrium point herein; In the time that repulsion is less than gravitation, make a concerted effort to show as gravitation.The whole process of passing from ring-shaped magnet center pit at bar magnet, there are three equilibrium points.The method that the present invention adopts opposite pole to penetrate, and get the equilibrium point that the equilibrium point of a certain side is demonstrating model.Demonstration effect is: always the gravitation between two balls and repulsion exist simultaneously, and all reduces with the increase of distance between the two, and the rule difference only reducing, repulsion reduces soon.When two sphere gaps are when equaling equilibrium distance, gravitation equals repulsion, and between two balls, acting force is zero; When two sphere gaps are when being less than equilibrium distance, gravitation, repulsion are with two sphere gaps from reducing and increase, but repulsion increases soon, and between two balls, acting force is repulsion, and the less repulsion of distance is larger; When two sphere gaps are when being greater than equilibrium distance, repulsion, gravitation reduce from increase with two sphere gaps, but repulsion reduces soon, and between two balls, acting force is gravitation, and along with the increase of distance, this gravitation first increases and then decreases until become very faint, can be ignored.The actual effect of demonstration effect and intermolecular force is in full accord.
Claims (4)
1. an intermolecular force action model, it is characterized in that: by center-pole, determine ball and moving ball forms, center-pole is part hollow tubular structure, one side is fixedly mounted with certain ball, in the center-pole of determining ball one side, be set with a cylindrical strong magnets being fixedly mounted with, the coaxial slip cap of opposite side is equipped with a moving ball, is embedded with an annular strong magnets in this moving ball, and center-pole two ends are shaped with respectively an anticreep end cap.
2. intermolecular force action model according to claim 1, is characterized in that: described determine ball, moving ball by left hemisphere and right hemisphere diametrically mutually setting-in form.
3. intermolecular force action model according to claim 1, is characterized in that: described cylindrical strong magnets, annular strong magnets all stick with glue agent and be cemented in corresponding site.
4. according to the intermolecular force action model described in claim 1 or 2 or 3, it is characterized in that: the powerful magnetic sheet of the replaceable one-tenth of described annular strong magnets or magnetic shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210596172.0A CN103903502A (en) | 2012-12-26 | 2012-12-26 | Intermolecular force action model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210596172.0A CN103903502A (en) | 2012-12-26 | 2012-12-26 | Intermolecular force action model |
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| CN103903502A true CN103903502A (en) | 2014-07-02 |
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| CN201210596172.0A Pending CN103903502A (en) | 2012-12-26 | 2012-12-26 | Intermolecular force action model |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111968466A (en) * | 2019-12-31 | 2020-11-20 | 江苏艾迪生教育发展有限公司 | Intelligent air intermolecular acting force experimental device |
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2012
- 2012-12-26 CN CN201210596172.0A patent/CN103903502A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111968466A (en) * | 2019-12-31 | 2020-11-20 | 江苏艾迪生教育发展有限公司 | Intelligent air intermolecular acting force experimental device |
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Application publication date: 20140702 |