CN201185049Y - Demonstration instrument for cockleshell-on momentum conservation phenomenon - Google Patents
Demonstration instrument for cockleshell-on momentum conservation phenomenon Download PDFInfo
- Publication number
- CN201185049Y CN201185049Y CNU2007203026831U CN200720302683U CN201185049Y CN 201185049 Y CN201185049 Y CN 201185049Y CN U2007203026831 U CNU2007203026831 U CN U2007203026831U CN 200720302683 U CN200720302683 U CN 200720302683U CN 201185049 Y CN201185049 Y CN 201185049Y
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- track
- boat
- demonstration instrument
- momentum conservation
- demonstration
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Abstract
The utility model relates to a demonstration instrument for demonstrating the momentum conservation phenomenon on a boat, suits demonstration experiment in a middle school classroom, and overcomes the shortcoming that a laboratory is lack of a demonstration instrument for demonstrating the momentum conservation phenomenon on the boat. The demonstration instrument mainly comprises an air cushion guide track equipped in a current laboratory, a matched sliding block of the air cushion guide track and a track fixed thereon, a remotely controlled electromagnet fixed at the front end of the track, a net sling fixed at the tail end of the track, and a small iron ball. The demonstration instrument successfully reproduces the momentum conservation phenomenon on the boat by substituting the air cushion guide track for the unresisted water surface, substituting the matched sliding block to simulate the boat and substituting the sliding of the small iron ball from the track for the movement of a person on the boat; and the quantitive demonstration is realized. The demonstration instrument has the advantages of easily accessible raw materials, convenient preparation, and easy generalization.
Description
Affiliated technical field
The utility model relates to a kind of device of demonstrating the momentum conservation phenomenon on the canoe, is applicable in the classroom, middle school as lecture experiment.
Background technology
The problem that often relates to the momentum conservation phenomenon on the canoe in the high school physics, simultaneously ship shrinks back, people on the canoe jumps or throwing sandbag or the like backward backward in walking on the canoe as the people, as if the student learn also can understand after the momentum conservation rule, but, often do not quite understand owing to be a kind of ideally to the understanding of theory.If can simulate this phenomenon in teaching, and guiding student carries out the measurement and the analysis of data, can increase the perceptual knowledge of student to momentum conservation greatly undoubtedly, deepens the understanding of student to this phenomenon.The laboratory, middle school does not also have such experimental provision at present.
Summary of the invention
In order to remedy the deficiency that the laboratory lacks the momentum conservation phenomenon demonstrator on the relevant canoe, air track and supporting slide block that the utility model adopts present laboratory to be equipped with are simulated the sight that canoe moves on the unresisted water surface, reproduce the momentum conservation phenomenon of relevant canoe easily.
The concrete technical scheme of the utility model is: the supporting slide block of two air tracks is bonding, on two slide blocks, fix a track (can retract) from flat the throwing the demonstrator, at the end of track one string bag is installed, guarantee just to fall in the string bag after little iron ball tumbles from track, the upper fixed one remote control electromagnet of track, the release of the little iron ball of remote control.The end of measuring the slide block and the mass M of track integral body, the quality m of little iron ball, release place of little iron ball respectively and be electromagnet is after the distance L of the string bag, slide block is placed on the air track, adjusting the guide rail level after the air track work makes slide block static, discharge bead, the skid piece retreats before the bead, and when bead was fallen into the string bag, integral body is stop motion together, measure that slide block retreats apart from S, can verify the law of conservation of momentum according to recording data.
Great advantage of the present utility model is exactly to utilize the small advantage of frictional resistance of air track, successfully simulates the momentum conservation phenomenon of canoe when moving on the desirable water surface, and has realized quantitative verification.The teacher can be in the exercise teaching, and guiding student reaches teaching efficiency by the observation and the measurement of this experiment.
Description of drawings
Below in conjunction with accompanying drawing and concrete experimental procedure the utility model is further specified.
Figure is an embodiment principle schematic of the present utility model.
1. remote control electromagnet among the figure, 2. bead, 3. track, 4. slide block, the 5. string bag, 6. air track
Embodiment
In the drawings, the supporting slide block (4) of two air tracks is bonding, on two slide blocks (4), fix a track (3), at the end of track (3) string bag (5) is installed, little iron ball (2) can just fall in the string bag (5) after track (3) tumbles, the upper fixed one remote control electromagnet (1) of track (3) can hold bead before the experiment.
Measure earlier slide block (4) and track (3) and the whole mass M of electromagnet (1) during experiment respectively, the quality m of bead (2), bead (2) release place is that the end of electromagnet (1) is after the distance L of the string bag (5), slide block (4) is placed on the air track (6), guide rail (6) level is adjusted in air track (6) work back makes slide block (4) static, discharge bead (2), the preceding skid piece of bead (2) (4) retreats, when bead is fallen into the string bag (5), integral body is stop motion together, measure that slide block (4) retreats apart from S, can verify the law of conservation of momentum according to recording data.
Claims (1)
1, the demonstrator of the momentum conservation phenomenon on a kind of canoe is characterized in that: the air track that demonstrator is equipped with by present laboratory, the supporting slide block of air track and be fixed on the track on the slide block, the remote control electromagnet that is fixed on the track front end, the string bag that is fixed on track end, little iron ball and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203026831U CN201185049Y (en) | 2007-12-24 | 2007-12-24 | Demonstration instrument for cockleshell-on momentum conservation phenomenon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203026831U CN201185049Y (en) | 2007-12-24 | 2007-12-24 | Demonstration instrument for cockleshell-on momentum conservation phenomenon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201185049Y true CN201185049Y (en) | 2009-01-21 |
Family
ID=40272787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203026831U Expired - Fee Related CN201185049Y (en) | 2007-12-24 | 2007-12-24 | Demonstration instrument for cockleshell-on momentum conservation phenomenon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201185049Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575183A (en) * | 2014-12-18 | 2015-04-29 | 王辉 | Experimental device validating momentum conservation law |
| CN104835389A (en) * | 2015-05-26 | 2015-08-12 | 西南大学 | Multifunctional physical exploration experiment demonstration instrument |
-
2007
- 2007-12-24 CN CNU2007203026831U patent/CN201185049Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575183A (en) * | 2014-12-18 | 2015-04-29 | 王辉 | Experimental device validating momentum conservation law |
| CN104835389A (en) * | 2015-05-26 | 2015-08-12 | 西南大学 | Multifunctional physical exploration experiment demonstration instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090121 Termination date: 20100125 |