CN202352180U - Tester for relationship between power and speed - Google Patents
Tester for relationship between power and speed Download PDFInfo
- Publication number
- CN202352180U CN202352180U CN2011204774003U CN201120477400U CN202352180U CN 202352180 U CN202352180 U CN 202352180U CN 2011204774003 U CN2011204774003 U CN 2011204774003U CN 201120477400 U CN201120477400 U CN 201120477400U CN 202352180 U CN202352180 U CN 202352180U
- Authority
- CN
- China
- Prior art keywords
- guide rail
- base plate
- rail base
- tester
- bungee
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a tester for relationship between power and speed. The tester consists of a trolley running guide rail base plate, an elastic baffle plate, two movable bolts, rubber bands, a trolley and a ticker-tape timer, wherein one end of the trolley running guide rail base plate is provided with the elastic baffle plate, and two sides at the center of the trolley running guide rail base plate are provided with the movable bolts, the rubber bands are fixed on the movable bolts, two ends of each rubber band are respectively fixed on the two movable bolts, the length of each rubber band can be flexibly adjusted, the other end of the trolley running guide rail base plate is provided with the ticker-tape timer, and the trolley is arranged on a guide rail of the guide rail base plate. The tester for exploring the relationship between the power and the speed is convenient and simple to use and low in loss during test, the test is easy to succeed, and the tester is good in teaching performance.
Description
Technical field
The utility model relates to a kind of instruments used for education, particularly relates to the instrument that the senior middle school physics teaching middle school student probe into " relation of merit and velocity variations ".
Technical background
Required 2 chapter 7 of high school physics textbook the 6th joint has been arranged the student experimenting of " probing into the relation of merit and velocity variations ".Its method is to nail on two mouthfuls of nails in the central both sides of 1.2 meters of block lengths, wide 12 centimetres rectangle plank, and an end of plank is loaded onto and got gauge ready, fixes bungee on the nail.
Dolly ejects under the effect of bungee, slides along plank.Bungee work and speed that dolly is obtained can be measured by paper tape and dotted timer.Change the radical of bungee, and make every length identical, carry out several times and measure, can obtain the data of some groups of merits and speed.
But in field research (in the student experimenting), owing to there is not special experimental apparatus, not only teachers ' teaching is inconvenient, and adopts above-mentioned method to do this experiment, has following big problem, has a strong impact on experiment effect.The one, dolly is prone at the volley and has followed closely collision, and causing testing can not be successful; The 2nd, dolly can be gone out plank and get rid of badly, not only causes the instrument loss too big, and experiment can not continue to accomplish.The 3rd, making some bungees fasten on nail identical its difficulty of back length is that inconsistent like some bungee length, then experiment effect will be very poor greatly.The 4th, friction force considerable influence experiment quality.
Summary of the invention
The instrument loss is big when solving student experimenting on the teaching material, the experiment difficulty is big and the problem of experiment effect difference; The utility model proposes a kind of experiment instrument of probing into merit and length velocity relation; By trolley travelling guide rail base plate, elastic baffle, two movable bolts, bungee, dollies, get timing ready and constitute, an end of trolley travelling guide rail base plate is equipped with elastic baffle, movable bolt is equipped with in central both sides; Be fixed with some on bungee on the movable bolt; Every bungee two ends are separately fixed on two movable bolts, and the other end of trolley travelling guide rail base plate is equipped with dotted timer, and dolly is placed on the guide rail of guide rail base plate.
Beneficial effect: this probe into merit and speed concern that experiment instrument is easy to operate, in the experiment instrument loss little, experiment is prone to successful, effective.
Description of drawings
Fig. 1 is an instrument general assembly drawing of the present invention.
Embodiment
As shown in Figure 1; One end of vehicle guide base plate 1 is equipped with elastic baffle 2, and the other end is equipped with dotted timer 4, and movable bolt 3 respectively is equipped with in central both sides; The two ends of bungee 6 are separately fixed in the pickup groove D of movable bolt; Dolly 5 is placed on the guide rail of guide rail base plate 1, and dolly 5 ejects under the effect of bungee 6, slides along guide rail.Bungee 6 works and speed that dolly 5 is obtained can be measured by paper tape and dotted timer 4.Change the radical of bungee 6, and make every length identical, carry out several times and measure, can obtain the data of some groups of merits and speed.
Is ordinate with bungee to the dolly work, and the speed that dolly obtains is horizontal ordinate, and the merit W when testing with the first time is a unit, makes W---U curve, i.e. merit---rate curve.Analyze this curve, can learn the quantitative relationship of bungee the speed of dolly work and dolly acquisition.The elastic baffle specification is 7 * 5 * 1cm.Movable bolt structure and size are shown in figure three.Aluminum trolley travelling guide rail two rails are complementary with the dolly wheel at a distance of 5 cm.Trolley travelling guide rail backplane specifications is 120 * 7 * 2cm.
Claims (1)
1. the experiment instrument of merit and length velocity relation; By trolley travelling guide rail base plate, elastic baffle, two movable bolts, bungee, dollies, get timing ready and constitute, an end of trolley travelling guide rail base plate is equipped with elastic baffle, movable bolt is equipped with in central both sides; Be fixed with some on bungee on the movable bolt; Every bungee two ends are separately fixed on two movable bolts, and the other end of trolley travelling guide rail base plate is equipped with dotted timer, and dolly is placed on the guide rail of guide rail base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204774003U CN202352180U (en) | 2011-11-26 | 2011-11-26 | Tester for relationship between power and speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204774003U CN202352180U (en) | 2011-11-26 | 2011-11-26 | Tester for relationship between power and speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202352180U true CN202352180U (en) | 2012-07-25 |
Family
ID=46541166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204774003U Expired - Fee Related CN202352180U (en) | 2011-11-26 | 2011-11-26 | Tester for relationship between power and speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202352180U (en) |
-
2011
- 2011-11-26 CN CN2011204774003U patent/CN202352180U/en not_active Expired - Fee Related
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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: 20120725 Termination date: 20121126 |