CN2069592U - Variable accelerated motion experimental device - Google Patents
Variable accelerated motion experimental device Download PDFInfo
- Publication number
- CN2069592U CN2069592U CN 90216874 CN90216874U CN2069592U CN 2069592 U CN2069592 U CN 2069592U CN 90216874 CN90216874 CN 90216874 CN 90216874 U CN90216874 U CN 90216874U CN 2069592 U CN2069592 U CN 2069592U
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- China
- Prior art keywords
- pulley
- accelerated motion
- slide block
- rule
- weights
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- 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 - Lifetime
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- 238000000034 method Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 238000011160 research Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Abstract
The utility model relates to a become accelerated motion experimental apparatus, it is with the help of air-cushion guide, make slider (2) be greater than 0 through fine rule (4) that pulley (5) and weight (7) are connected and the contained angle between guide rail (1), when slider (2) slided to the one end of pulley (5), above-mentioned contained angle progressively strengthens, therefore the direction of the power has been changed, the plumb line of pulley (5) below passes through perpendicular photogate (8), the falling speed of survey weight (7). The method can be used for researching the kinematics rule and the dynamics rule under variable force, solves the problem of verifying the mechanical formula of a two-dimensional state, can also be used for researching the particle group problem, and provides an image example for students to process the mechanical problem by using high-grade mathematics.
Description
The utility model is a kind of variable accelerated motion experimental provision, belongs to physics educational apparatus.
Use at present air track research variable force to be only limited to the size that changes acting force in physics teaching, the mass change of this device during by means of the metallic bond vertical drop causes the increase that acts on power on the slide block, and the constant force problem is changed into variable force research.Yet this device only can embody a feature of variable force, because power is vector, existing size also has direction, and it can't solve the power on the object of acting on owing to the variation that the change of direction causes, the character of research variable force is restricted.
The utility model purpose is to overcome the deficiency of said apparatus and a kind of variable accelerated motion experimental provision is provided, it can change the direction that acts on power on the slide block, uniformly accelerated motion is become variable accelerated motion, this device can not only be studied the variable force rule under one dimension (X-axis horizontal direction) state, can also study mechanics rule and Particle Group problem under two dimension (X-axis horizontal direction, the Y-axis vertical direction) state.
The utility model is achieved through the following technical solutions: by air track, make fine rule (4) that slide block (2) is connected with weights (7) through pulley (5) and the angle between the guide rail (1) greater than 0 °, when slide block (2) from guide rail (1) when an end of pulley (5) slides, above-mentioned angle progressively strengthens, thereby changed the direction of power, the vertical line of pulley (5) below is used to measure the falling speed of weights (7) by vertical light electric switch (8).
The utility model also type is achieved through the following technical solutions: have microscler adjustment groove (9) on the support plate (6) that supports pulley (5), be used to adjust the height of support plate (6), to change the relative position of pulley (5) and slide block (2).
The utility model also is achieved through the following technical solutions: used weights (7) axial cross section is " worker " font, this shape make its when falling on lower limb shading respectively, to guarantee the accurate measurement time.
The utility model description of drawings is as follows:
Fig. 1 is a structural representation.
Fig. 2 is weights (a 7) structural representation.
(1) is guide rail among the figure, and (2) are slide block, and (3) are photogate, and (4) are fine rule, and (5) are pulley, and (6) are support plate, and (7) are weights, and (8) are the vertical light electric switch, and (9) for adjusting groove, (10) are support.
Now be described with reference to the accompanying drawings the utility model: this device is finished by means of air track, and this example is used the QG-5 type, is former machine accessory except that support plate (6) and weights (7).Support plate (6) is installed in end at guide rail (1), and pulley (5) is equipped with in support plate (6) upper edge, and the below has strip and adjusts groove (9), if unclamp set bolt, just can adjust the height of support plate (6), to adapt to the different experiments requirement.Slide block (2) is connected with fine rule (4) with weights (7), and cross pulley (5), the angle between fine rule (4) and the guide rail (1) is greater than 0 ° when being in initial position at slide block (2), and this example is 30 °, and promptly pulley (5) coboundary is higher than the line point of slide block (2).Vertical line below at pulley (5) is equipped with vertical light electric switch (8), weights (7) can pass wherein when falling, instantaneous velocity is measured by it, vertical light electric switch (8) can be fixed in support (10) and go up (as this example), also support plate (6) can be mounted thereon or be installed in after the lower edge is long on the position that other effect is equal to, vertical light electric switch (8) quantity and setting height(from bottom) are decided on requirement of experiment, and this example is 1 and apart from pulley (5) 1m.It is the weights (7) of " worker " font that this device also adopts axial cross section, its quality and highly also look requirement of experiment and make, and this example is 10g and diameter 10mm.
The utility model is adjusted photogate (3) and vertical light electric switch (8) earlier when experiment position, allow slide block be in initial position, allow the counterweight free-falling affect slide block to move then, because slide block is approaching gradually apart from pulley, fine rule and guide rail angle move with slide block and become big, thereby the direction that acts on power on the slide block also changes thereupon, and slide block is just done variable accelerated motion.Note X-axis horizontal velocity V
XWith Y-axis vertical speed V
Y, and then the mechanics rule under the research variable accelerated motion, for example: the speed formula of the kinematics rule of checking one dimension state:
(wherein m and M are the quality of counterweight and slide block, the 1st, and the fine rule length overall, h is a plate height, x is horizontal shift, g is that gravity quickens), and the Acceleration Formula after the differentiate; Under the research checking two-dimensional state
With
Between relational expression:
With Newton second law, theorem of kinetic energy; Also can verify the conservation of mechanical energy theorem that slide block and counterweight are formed, i.e. mgh=1/2 my
2+ 1/2 mx
2, in a word,, can verify the multiple mechanics formula relevant with the variable force speed change according to different course needs.The utility model experimental error is between 1%-4%.
The utility model can be studied Kinematics Law and the dynamic law under the variable force, solved the mechanics formula problem of checking two-dimensional state, also can be used as the research of Particle Group problem, for processing mechanics problem with the method for higher mathematics, the student provides vivid illustration, the utility model is simple in structure, easily operation, successful.
Claims (3)
1, a kind of variable accelerated motion experimental provision, it is made up of guide rail (1), slide block (2), photogate (3), fine rule (4), pulley (5), support plate (6), weights (7), vertical light electric switch (8), it is characterized in that: fine rule (4) that slide block (2) is connected with weights (7) through pulley (5) and the angle between the guide rail (1) are greater than 0 °; The vertical line of pulley (5) below is by vertical light electric switch (8).
2, a kind of variable accelerated motion experimental provision according to claim 1 is characterized in that: have on the support plate (6) and adjust groove (9).
3, a kind of variable accelerated motion experimental provision according to claim 1, it is characterized in that: the axial cross section of weights (7) is " worker " font.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90216874 CN2069592U (en) | 1990-07-30 | 1990-07-30 | Variable accelerated motion experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90216874 CN2069592U (en) | 1990-07-30 | 1990-07-30 | Variable accelerated motion experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2069592U true CN2069592U (en) | 1991-01-16 |
Family
ID=4895963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90216874 Expired - Lifetime CN2069592U (en) | 1990-07-30 | 1990-07-30 | Variable accelerated motion experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2069592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122906A (en) * | 2019-12-05 | 2020-05-08 | 安徽皖仪科技股份有限公司 | Calibration method for three-point laser type light-cutting speed and acceleration tester |
-
1990
- 1990-07-30 CN CN 90216874 patent/CN2069592U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122906A (en) * | 2019-12-05 | 2020-05-08 | 安徽皖仪科技股份有限公司 | Calibration method for three-point laser type light-cutting speed and acceleration tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |