CN206058662U - A kind of physics dolly instantaneous velocity demonstrator - Google Patents
A kind of physics dolly instantaneous velocity demonstrator Download PDFInfo
- Publication number
- CN206058662U CN206058662U CN201620797730.3U CN201620797730U CN206058662U CN 206058662 U CN206058662 U CN 206058662U CN 201620797730 U CN201620797730 U CN 201620797730U CN 206058662 U CN206058662 U CN 206058662U
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- China
- Prior art keywords
- dolly
- instantaneous velocity
- electric spark
- left end
- air track
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Abstract
The utility model discloses a kind of physics dolly instantaneous velocity demonstrator, including platform and counterweight, air track is fixed with the platform, the left end of the air track is provided with limited post, buffer spring is connected with the limited post, the end of the buffer spring is connected with rubber blanket, the right-hand member of the air track is provided with electric spark clock, the left end of the platform is provided with pulley, the counterweight is connected with the left end of dolly by drawstring Jing pulleys, the right-hand member of the dolly is connected with paper tape, and paper tape passes through electric spark clock.A series of getting ready is carried out on paper tape by electric spark clock, as the supply frequency of electric spark clock is 50 hertz, so each makes a call to a point for 0.02 second, the average speed of this period is equal to using the instantaneous velocity of intermediate time, can be by formula V=（Xn+1+Xn）/ 2T is calculated, and than using V=Δ s/ Δ t, is greatly reduced error so that the dolly instantaneous velocity accuracy obtained is improved.
Description
Technical field
This utility model belongs to physics teaching auxiliary appliance technical field, and in particular to a kind of physics dolly instantaneous velocity
Demonstrator.
Background technology
Mechanics is highly important part in physics subject, is related to comparison extensively, often through many in the teaching of reality
Experiment is demonstrated, and allows student's profound understanding, and for example, demonstration uniformly accelerated motion, Newton's law, momentum theorem and kinetic energy are fixed
Reason etc., these can be tested and be drawn data by test carriage, provide facility for teaching.Existing physics dolly reality
Test using photogate and dark slide to measure t and s, seek the instantaneous velocity of dolly, its formula is V=Δ s/ Δ t, as Δ t exists
In the case of infinitesimal, instantaneous velocitys of the v for trying to achieve for dolly, and actual Δ t not infinitely small enough, in the hope of instantaneous speed
Degree v errors are relatively large, not enough accurately.A kind of physics dolly instantaneous velocity demonstrator is proposed for this.
Utility model content
The purpose of this utility model is to provide a kind of physics dolly instantaneous velocity demonstrator, to solve above-mentioned background technology
The problem of middle proposition.
For achieving the above object, this utility model provides following technical scheme：A kind of physics dolly instantaneous velocity demonstrator,
Including platform and counterweight, air track on the platform, is fixed with, the left end of the air track is provided with limited post, described spacing
Buffer spring is connected with post, the end of the buffer spring is connected with rubber blanket, and the right-hand member of the air track is provided with electric fire
Flower dotted timer, the left end of the platform are provided with pulley, and the counterweight is connected with the left end of dolly by drawstring Jing pulleys, institute
The right-hand member for stating dolly is connected with paper tape, and paper tape passes through electric spark clock.
Preferably, the electric spark clock is electrically connected with the power supply.
Preferably, the dolly is arranged on air track.
Technique effect of the present utility model and advantage：The physics dolly instantaneous velocity demonstrator, dolly drive to it is spacing
Post, dolly clash into rubber column, so that buffer spring is deformed upon absorbs the energy for clashing into, protection dolly is injury-free；It is logical
Cross electric spark clock carry out on paper tape it is a series of get ready, due to electric spark clock supply frequency be 50
Hertz, so each makes a call to a point for 0.02 second, using intermediate time instantaneous velocity equal to this period average speed, can be by
Formula V=（Xn+1+Xn）/ 2T is calculated, and than using V=Δ s/ Δ t, is greatly reduced error so that the dolly obtained
Instantaneous velocity accuracy is improved.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1 platform, 2 air tracks, 3 dollies, 4 electric spark clocks, 5 limited posts, 6 buffer springs, 7 rubber
Pad, 8 pulleys, 9 counterweights, 10 paper tapes.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
This utility model provides a kind of physics dolly instantaneous velocity demonstrator as shown in Figure 1, including platform 1 and counterweight
9, air track 2 is fixed with the platform 1, the left end of the air track 2 is provided with limited post 5, connects on the limited post 5
The end for having buffer spring 6, the buffer spring 6 is connected with rubber blanket 7, and the right-hand member of the air track 2 is provided with electric spark and beats
Point timer 4, the electric spark clock 4 are electrically connected with the power supply, and the left end of the platform 1 is provided with pulley 8, described little
Car 3 is arranged on air track 2, and the counterweight 9 is connected with the left end of dolly 3 by drawstring Jing pulleys 8, the right side of the dolly 3
End is connected with paper tape 10, and paper tape 10 passes through electric spark clock 4, and the physics dolly instantaneous velocity demonstrator, dolly exist
Limited post 5 is driven to, dolly clashes into rubber blanket 7, so that buffer spring 6 is deformed upon absorbs the energy for clashing into, protected little
Car is injury-free；By electric spark clock 4 carry out on paper tape 10 it is a series of get ready, as electric spark gets timing ready
The supply frequency of device 4 is 50 hertz, so each makes a call to a point for 0.02 second, when being equal to this section using the instantaneous velocity of intermediate time
Between average speed, can be by formula V=（Xn+1+Xn）/ 2T is calculated, and than using V=Δ s/ Δ t, is greatly reduced mistake
Difference so that the dolly instantaneous velocity accuracy obtained is improved.
Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, this is not limited to
Utility model, although being described in detail to this utility model with reference to the foregoing embodiments, for those skilled in the art
For, which still can be modified to the technical scheme described in foregoing embodiments, or to which part technical characteristic
Equivalent is carried out, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc.,
Should be included within protection domain of the present utility model.
Claims (3)
1. a kind of physics dolly instantaneous velocity demonstrator, including platform（1）And counterweight（9）, it is characterised in that：The platform（1）
On be fixed with air track（2）, the air track（2）Left end be provided with limited post（5）, the limited post（5）On be connected with
Buffer spring（6）, the buffer spring（6）End be connected with rubber blanket（7）, the air track（2）Right-hand member be provided with electricity
Spark dotted timer（4）, the platform（1）Left end be provided with pulley（8）, the counterweight（9）By drawstring Jing pulleys with it is little
Car（3）Left end connection, the dolly（3）Right-hand member be connected with paper tape（10）, and paper tape（10）Timing is got ready through electric spark
Device（4）.
2. a kind of physics dolly instantaneous velocity demonstrator according to claim 1, it is characterised in that：The electric spark is got ready
Timer（4）It is electrically connected with the power supply.
3. a kind of physics dolly instantaneous velocity demonstrator according to claim 1, it is characterised in that：The dolly（3）If
Put in air track（2）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620797730.3U CN206058662U (en) | 2016-07-27 | 2016-07-27 | A kind of physics dolly instantaneous velocity demonstrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620797730.3U CN206058662U (en) | 2016-07-27 | 2016-07-27 | A kind of physics dolly instantaneous velocity demonstrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206058662U true CN206058662U (en) | 2017-03-29 |
Family
ID=58379386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620797730.3U Expired - Fee Related CN206058662U (en) | 2016-07-27 | 2016-07-27 | A kind of physics dolly instantaneous velocity demonstrator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206058662U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109132293A (en) * | 2018-10-15 | 2019-01-04 | 谢金钱 | A kind of building waste transporting equipment |
-
2016
- 2016-07-27 CN CN201620797730.3U patent/CN206058662U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109132293A (en) * | 2018-10-15 | 2019-01-04 | 谢金钱 | A kind of building waste transporting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20170727 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |