CN103280142A - Experimental apparatus for exploring and demonstrating momentum theorem - Google Patents
Experimental apparatus for exploring and demonstrating momentum theorem Download PDFInfo
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- CN103280142A CN103280142A CN2013102473217A CN201310247321A CN103280142A CN 103280142 A CN103280142 A CN 103280142A CN 2013102473217 A CN2013102473217 A CN 2013102473217A CN 201310247321 A CN201310247321 A CN 201310247321A CN 103280142 A CN103280142 A CN 103280142A
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- impulse force
- momentum
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- theorem
- stilt
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Abstract
The invention discloses an experimental apparatus for exploring and demonstrating the momentum theorem. The experimental apparatus comprises a base, a support, a collision weight, a supporting object and an impact force measuring circuit. The support is fixed on the base, the collision weight is hung on the support and can oscillate back and forth, and the impact force measuring circuit can be used for measuring and displaying force born by the supporting object when the collision weight and the supporting object collide. The experimental apparatus is simple in structure, low in cost, simple in operation, obvious in effect, and capable of helping students to visually understand the momentum theorem and enriching teaching content and teaching methods, and materials can be obtained easily.
Description
Technical field
The present invention relates to a kind of educational aid, particularly a kind of experimental provision of probing into the demonstration theorem of momentum.
Background technology
" theorem of momentum " is very important key content in the physics mechanics, it uses wider than Newton's laws of motion, yet also do not have manufacturer production to go out to probe into or demonstrate the experimental provision of theorem of momentum at present, in teaching process, teachers derive through theory to draw theorem of momentum.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of experimental provision of probing into the demonstration theorem of momentum.
The objective of the invention is to be achieved through the following technical solutions:
A kind of experimental provision of probing into the demonstration theorem of momentum, comprise base, support, collision weight, stilt and impulse force metering circuit, described support is fixed on the base, described collision weight hangs on the support and can do and swings back and forth, and described impulse force metering circuit is used for measuring and shows the stressed size of stilt when collision weight and stilt bump.
Further, described collision weight is ball or right cylinder or square body.
Further, described collision weight and stilt are coated with dismountable soft layer.
Further, described experimental provision also comprises the index dial that is fixed on the support, and described index dial is used for showing that the collision weight departs from the angle of equilibrium position.
Further, described impulse force metering circuit comprises power supply, metallic resistance, impulse force meter, guide rail and sliding pin, described sliding pin is fixed on the stilt, above support horizontally slips along smooth guide rail, above support, power supply, impulse force meter, metallic resistance, sliding pin are connected in series successively, and the collision weight changes the contact position of sliding pin and metallic resistance by the position that changes stilt with this.
Further, described impulse force metering circuit also comprises spring and the metal link stopper that connects successively, and described metal link stopper is fixed on the base and with power supply and is connected, and described spring is connected with sliding pin.
Further, described impulse force metering circuit also comprises switch, and power supply is connected by switch with the impulse force meter.
Further, described impulse force metering circuit also comprises current-limiting resistance, and the impulse force meter is connected by current-limiting resistance with switch.
The invention has the beneficial effects as follows:
The present invention is simple in structure, draws materials easily, and with low cost, simple to operate, effect is obvious, can help the student to understand theorem of momentum intuitively, has enriched the content of courses and teaching means.
Description of drawings
In order to make purpose of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 is experimental provision structural drawing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in the figure, a kind of experimental provision of probing into the demonstration theorem of momentum, comprise base 1, support 2, collision weight 4 stilts and impulse force metering circuit, described support 2 is fixed on the base 1, described collision weight 4 hangs on the support 2 and can do and swings back and forth, and described impulse force metering circuit is used for measuring and shows the stressed size of stilt when collision weight 4 bumps with stilt.
Described collision weight 4 is ball or cylinder or square body, and the dismountable soft layer of one deck can be wrapped up in collision weight surface.
Described impulse force meter also comprises the index dial 5 that is fixed on the support 2, and described index dial 5 is used for showing that collision weight 4 departs from the angle of equilibrium position.
Described impulse force meter comprises power supply 12, metallic resistance 7, impulse force meter 3 and sliding pin 8, described sliding pin 8 is fixed on the stilt 6, described power supply 12, impulse force meter 3, metallic resistance 7, sliding pin 8 and guide rail 14 are connected in series successively, sliding pin 8 is fixed on the stilt 6, stilt 6 surfaces can be wrapped up the dismountable soft layer of one deck and can do at smooth guide rail and be horizontally slipped, and collision weight 4 changes stilt 6 by bump position changes the contact position of sliding pin 8 and metallic resistance 7 with this.
As the improvement to present embodiment, described impulse force metering circuit also comprises spring 9 and the metal link stopper 11 that connects successively, and described metal link stopper 11 is fixed on the base 1 and with power supply 12 and is connected, and described spring 9 is connected with sliding pin 8.Spring 9 can make the automatic correcting action of stilt.
Described impulse force metering circuit respectively also comprises switch 13, and power supply 12 is connected by switch 13 with impulse force meter 3.
Described impulse force metering circuit also comprises current-limiting resistance 10, and impulse force meter 3 is connected by current-limiting resistance 10 with switch 13.
When stilt 6 was not subjected to impulse force, impulse force meter 3 registrations were 0; When stilt 6 is subjected to impulse force, just can read the size of this impulse force from impulse force meter 3.Power is more big, and spring 9 decrements are more big, and the resistance value in metallic resistance 7 places in circuit reduces, and it is big that the registration of impulse force meter 3 just becomes.So the size that is shown by the impulse force meter is just known the size that stilt 6 is stressed.During experiment, after will colliding weight 4 and drawing back the equilibrium position, freely discharge, gravitional force is converted into kinetic energy and bumps in equilibrium position and stilt 6, the size of impulse force when demonstrating collision by impulse force meter 3.
The use step of this experimental provision:
1). when speed is constant, the relation of impulse force size and object quality size when probing into collision
Closing Switch 13 makes collision weight 4 fall from sustained height (will collide weight and be pulled away from the identical angle in equilibrium position), guarantees that namely speed is certain.Be inserted in the collision thing iron staff or the quality of extracting to change the collision weight, bump against with collision weight 4 and stilt 6, can draw from the reading of impulse force dynamometer, when speed was constant, the quality of collision weight was more big, and impulse force is just more big during interaction.
2). during mass conservation, the relation of impulse force size and object speed size when probing into collision
Closing Switch 13 guarantees collision weight mass conservation (do not insert iron staff or all insert iron staff), makes the collision weight fall the velocity magnitude when namely changing collision from differing heights (weight is pulled away from the different angle in equilibrium position).Stilt bumps against with the collision weight, and in the time of can drawing the mass conservation of object from the reading of impulse force dynamometer, speed is more big, and impulse force is just more big during interaction.
3). quality, when speed is constant, the relation of impulse force size and action time when probing into collision
Closing Switch 13 guarantees collision weight mass conservation (do not insert iron staff or all insert iron staff), and the collision weight is fallen from equal height (will collide weight and be pulled away from the identical angle in equilibrium position), and the velocity magnitude when namely guaranteeing collision is identical.Bump (when colliding for the first time with stilt and collision weight, collision weight or stilt surface superscribe soft layer, when colliding for the second time, soft layer is not wrapped up on collision weight and stilt surface), can draw from the reading of impulse force meter, when the collision weight package wrapped soft layer, the interaction time was long, and impulse force is less; When the collision weight did not wrap up soft layer, the interaction time was short, and impulse force is bigger.
Collision weight quality and speed all under the constant situation, illustrate that the initial momentum before its collision is identical, and all vanishing of collision back speed illustrate that its last momentum is identical, and then collision front and back momentum change amount is identical.When colliding with different surfaces action time difference, the size of power is also different, the change amount that momentum be described is not that the size of Dan Youli determines, but by common decision of the size of power and action time, namely by the decision of momentum size.Quantitative relationship between the change amount of object momentum and the suffered momentum size is just showed by theorem of momentum.
The present invention also can be only according to sliding distance or the compression degree of the spring size of coming antistress of stilt on rough guide rail.
Explanation is at last, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from claims of the present invention institute restricted portion.
Claims (8)
1. probe into the experimental provision of demonstrating theorem of momentum for one kind, it is characterized in that: comprise base, support, collision weight, stilt and impulse force metering circuit, described support is fixed on the base, described collision weight hangs on the support and can do and swings back and forth, and described impulse force metering circuit is used for measuring and shows the stressed size of stilt when collision weight and stilt bump.
2. according to the described a kind of experimental provision of probing into the demonstration theorem of momentum of claim 1, it is characterized in that: described collision weight is ball or right cylinder or square body.
3. according to the described a kind of experimental provision of probing into the demonstration theorem of momentum of claim 1, it is characterized in that: described collision weight and stilt are coated with dismountable soft layer.
4. according to the described a kind of experimental provision of probing into the demonstration theorem of momentum of claim 1, it is characterized in that: described experimental provision also comprises the index dial that is fixed on the support, and described index dial is used for showing that the collision weight departs from the angle of equilibrium position.
5. according to the described a kind of experimental provision of probing into the demonstration theorem of momentum of claim 1, it is characterized in that: described impulse force metering circuit comprises power supply, metallic resistance, impulse force meter, guide rail and sliding pin, described sliding pin is fixed on the stilt, above support horizontally slips along smooth guide rail, above support, power supply, impulse force meter, metallic resistance, sliding pin are connected in series successively, and the collision weight changes the contact position of sliding pin and metallic resistance by the position that changes stilt with this.
6. according to the described a kind of experimental provision of probing into the moving Li Dingli of demonstration of claim 5, it is characterized in that: described impulse force metering circuit also comprises spring and the metal link stopper that connects successively, described metal link stopper is fixed on the base and with power supply and is connected, and described spring is connected with sliding pin.
7. according to the described a kind of experimental provision of probing into the demonstration theorem of momentum of claim 6, it is characterized in that: described impulse force metering circuit also comprises switch, and power supply is connected by switch with the impulse force meter.
8. according to the described a kind of experimental provision of probing into the demonstration theorem of momentum of claim 7, it is characterized in that: described impulse force metering circuit also comprises current-limiting resistance, and the impulse force meter is connected by current-limiting resistance with switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247321.7A CN103280142B (en) | 2013-06-20 | 2013-06-20 | Experimental apparatus for exploring and demonstrating momentum theorem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310247321.7A CN103280142B (en) | 2013-06-20 | 2013-06-20 | Experimental apparatus for exploring and demonstrating momentum theorem |
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| Publication Number | Publication Date |
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| CN103280142A true CN103280142A (en) | 2013-09-04 |
| CN103280142B CN103280142B (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310247321.7A Expired - Fee Related CN103280142B (en) | 2013-06-20 | 2013-06-20 | Experimental apparatus for exploring and demonstrating momentum theorem |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531057A (en) * | 2013-11-06 | 2014-01-22 | 魏广栋 | Physical teaching instrument |
| CN104036674A (en) * | 2014-06-05 | 2014-09-10 | 上海应用技术学院 | Dynamic collision experiment device |
| CN104504965A (en) * | 2015-01-05 | 2015-04-08 | 曹小玲 | Method of verifying momentum theorem in action of variable forces |
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| CN2147611Y (en) * | 1993-04-19 | 1993-11-24 | 国家教育委员会教学仪器研究所 | Kinetic and potential energy display device |
| CN2660622Y (en) * | 2003-07-24 | 2004-12-01 | 兖矿集团有限公司 | Non-obstruct collision experimental appts. |
| GR1004994B (en) * | 2005-01-07 | 2005-09-16 | Δημητριος Τσαουσης | Device for the study of the angular momentum and the calculation of the centripetal force work |
| CN201974979U (en) * | 2011-03-10 | 2011-09-14 | 张延赐 | Momentum conservation law demonstrating teaching aid |
| CN202632598U (en) * | 2012-06-29 | 2012-12-26 | 孙方尽 | Energy and momentum conservation verification tester |
| CN202677673U (en) * | 2012-07-17 | 2013-01-16 | 刘永智 | Experimental device for testing mechanical energy and momentum conservation |
| CN203300099U (en) * | 2013-06-20 | 2013-11-20 | 西南大学 | Experiment apparatus for demonstration of the theorem of momentum |
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2013
- 2013-06-20 CN CN201310247321.7A patent/CN103280142B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2147611Y (en) * | 1993-04-19 | 1993-11-24 | 国家教育委员会教学仪器研究所 | Kinetic and potential energy display device |
| CN2660622Y (en) * | 2003-07-24 | 2004-12-01 | 兖矿集团有限公司 | Non-obstruct collision experimental appts. |
| GR1004994B (en) * | 2005-01-07 | 2005-09-16 | Δημητριος Τσαουσης | Device for the study of the angular momentum and the calculation of the centripetal force work |
| CN201974979U (en) * | 2011-03-10 | 2011-09-14 | 张延赐 | Momentum conservation law demonstrating teaching aid |
| CN202632598U (en) * | 2012-06-29 | 2012-12-26 | 孙方尽 | Energy and momentum conservation verification tester |
| CN202677673U (en) * | 2012-07-17 | 2013-01-16 | 刘永智 | Experimental device for testing mechanical energy and momentum conservation |
| CN203300099U (en) * | 2013-06-20 | 2013-11-20 | 西南大学 | Experiment apparatus for demonstration of the theorem of momentum |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531057A (en) * | 2013-11-06 | 2014-01-22 | 魏广栋 | Physical teaching instrument |
| CN104036674A (en) * | 2014-06-05 | 2014-09-10 | 上海应用技术学院 | Dynamic collision experiment device |
| CN104036674B (en) * | 2014-06-05 | 2016-09-14 | 上海应用技术学院 | Kinetic collision experimental provision |
| CN104504965A (en) * | 2015-01-05 | 2015-04-08 | 曹小玲 | Method of verifying momentum theorem in action of variable forces |
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| Publication number | Publication date |
|---|---|
| CN103280142B (en) | 2015-02-11 |
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Granted publication date: 20150211 Termination date: 20170620 |