CN101470984A - Sliding friction force demonstration apparatus - Google Patents
Sliding friction force demonstration apparatus Download PDFInfo
- Publication number
- CN101470984A CN101470984A CNA2007101728139A CN200710172813A CN101470984A CN 101470984 A CN101470984 A CN 101470984A CN A2007101728139 A CNA2007101728139 A CN A2007101728139A CN 200710172813 A CN200710172813 A CN 200710172813A CN 101470984 A CN101470984 A CN 101470984A
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- Prior art keywords
- sliding friction
- friction force
- motor
- key
- demonstration apparatus
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Abstract
The invention discloses a demonstration device of sliding friction force, which comprises a slide block, a force gauge, a thin wire, a gear shifting box, a key, a battery box, a motor, a winding shaft and a wood board, wherein the gear shifting box, the key and the battery box are fixed with the wood board through a screw, one end of the force gauge is drawn on an iron ring of the wood board, the other end is sleeved on the thin wire, and the motor, the key and the battery box are connected through a line conductor. The demonstration device has the advantages that the operation is convenient, and the phenomena are clear and stable.
Description
Technical field:
The present invention relates to a kind of teaching demonstration equipment, relate in particular to a kind of sliding friction force demonstration apparatus in the physics teaching in secondary school.
Background technology:
In physics teaching in secondary school, force of sliding friction is the emphasis and the difficult point content of teaching.And that the best method of prominent this difficult point allows the student go to be familiar with the force of sliding friction size by experiment exactly is relevant with which factor.Present experimental technique is: allow an end of spring balance hold the wooden unit that is placed on the horizontal plank earlier, use the other end of hand spring scale again, make it do linear uniform motion, observe the reading of spring balance simultaneously.Because the suffered pulling force of spring balance equates with the suffered friction force of wooden unit, shown in this registration be exactly the suffered force of sliding friction of wooden unit.But the shortcoming that this experimental program exists is: the linear uniform motion of wooden unit is difficult to control, and the registration of spring balance is changing all the time, can only obtain the mean value of the suffered friction force of wooden unit, and this has directly influenced the understanding of student to force of sliding friction.
Summary of the invention:
At the deficiency that prior art exists, the object of the present invention is to provide a kind of simple in structure, simple to operate, demonstration outstanding effect sliding friction force demonstration apparatus.
Goal of the invention of the present invention is achieved through the following technical solutions:
A kind of sliding friction force demonstration apparatus comprises slide block, dynamometer, fine rule, wheel box, telegraph key, battery case, motor, roll and plank.Wherein, fix with screw between wheel box, telegraph key, battery case and the plank; One end of dynamometer is pulled on the iron hoop of wooden unit, and the other end is enclosed within on the fine rule; Connect with lead between motor, telegraph key, the battery case.
The presentation process of this device: after the energized, motor begins to rotate, and drives the roll uniform rotation through wheel box, slide block will be done the linear uniform motion than jogging speed, at this moment, the dynamometer registration is stabilized on a certain scale, can obtain the size of friction force easily, clearly.
Apparatus of the present invention utilization be simple and easy to material make, the present invention has easy to operate, the advantage that phenomenon is clear, stable.
Description of drawings
Accompanying drawing is a kind of sliding friction force demonstration apparatus structural representation of the present invention.
The number in the figure explanation
1---slide block 2---dynamometer 3---fine rule 4---wheel box
5---telegraph key 6---battery case 7---motor 8---roll 9---planks
Embodiment
How further specify the present invention below in conjunction with accompanying drawing realizes:
Embodiment
1) slide block is the wooden unit of 40 * 75 * 160mm.
2) telegraph key is a push button normal off telegraph key.
3) dynamometry is counted the spring balance of J00107.
4) fine rule is the silk thread of diameter 0.2mm.
5) wheel box is the used wheel box of toy dolly.
6) battery case saves No. 5 batteries with 2.
7) after the energized, motor begins to rotate, and drives the roll uniform rotation through wheel box, and slide block will be done the linear uniform motion than jogging speed.At this moment, the spring balance registration is stabilized on a certain scale, can obtain the size of friction force easily, clearly.
Claims (1)
1, a kind of sliding friction force demonstration apparatus comprises slide block, dynamometer, fine rule, wheel box, telegraph key, battery case, motor, roll and plank, it is characterized in that: fix with screw between described wheel box, telegraph key, battery case and the plank; One end of dynamometer is pulled on the iron hoop of wooden unit, and the other end is enclosed within on the fine rule; Connect with lead between motor, telegraph key, the battery case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101728139A CN101470984A (en) | 2007-12-24 | 2007-12-24 | Sliding friction force demonstration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101728139A CN101470984A (en) | 2007-12-24 | 2007-12-24 | Sliding friction force demonstration apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101470984A true CN101470984A (en) | 2009-07-01 |
Family
ID=40828431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101728139A Pending CN101470984A (en) | 2007-12-24 | 2007-12-24 | Sliding friction force demonstration apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101470984A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110648569A (en) * | 2019-09-23 | 2020-01-03 | 西京学院 | Frictional force demonstration platform for physics experiments |
-
2007
- 2007-12-24 CN CNA2007101728139A patent/CN101470984A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110648569A (en) * | 2019-09-23 | 2020-01-03 | 西京学院 | Frictional force demonstration platform for physics experiments |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090701 |