CN107293196A - A kind of novel centripetal force verifies device - Google Patents
A kind of novel centripetal force verifies device Download PDFInfo
- Publication number
- CN107293196A CN107293196A CN201710719469.4A CN201710719469A CN107293196A CN 107293196 A CN107293196 A CN 107293196A CN 201710719469 A CN201710719469 A CN 201710719469A CN 107293196 A CN107293196 A CN 107293196A
- Authority
- CN
- China
- Prior art keywords
- buncher
- centripetal force
- small ball
- support
- laser leveler
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Educational Administration (AREA)
- Computational Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Device is verified the present invention relates to a kind of novel centripetal force, include including base and support, the lower end of support is arranged on base, crossbeam is additionally provided with the middle and upper part of support, it is provided with crossbeam and is connected with small ball by hanging fine rule, laser leveler and Level tune platform are additionally provided with base, laser leveler is located on Level tune platform, also include the power set for driving small ball to move.Using device of the present invention, pass through be provided with power set and laser leveler, the rotation of buncher is controlled by speed setting controller, can directly judge whether bead moves in a circle using laser leveler, it judges relatively accurate.It is easy for operation with simple in construction, demonstrate visual in image, student's property of participation is strong, for verifying centripetal force formula, a kind of novel teaching aid is provided for middle school physics teaching.
Description
Technical field
The invention belongs to Middle School Physics mechanics teaching and laboratory apparatus technical field, relate in particular to a kind of new centripetal
Power verifies device.
Background technology
High school physicses required 2（People's Education Publishing House, April the 4th edition in 2010）Chapter 5, " curvilinear motion " Section 6 is centripetal
Power, having a lecture experiment " expression formula for verifying centripetal force roughly with conical pendu0 ", the text is as follows for it：Fine rule is suspended from one
Steel ball, fine rule upper end is fixed on iron stand.The blank sheet of paper for drawing several concentric circles is placed in horizontal table top, when making steel ball static
It is placed exactly in the center of circle.Hand-motion steel ball is used, tries to make it along some circular motion on paper.Specifically by by cord connect it is small
Ball one end is fixed on iron stand, and the blank sheet of paper for being decorated with concentric circles is tiled on the table, the support of iron stand is adjusted, bead is erected
The center of circle of concentric circles is located just at when directly hanging static.Hand-motion bead is used, allows bead to do conical pendu0 fortune under the drive of cord
Dynamic, i.e., bead moves in a circle in the horizontal plane, when motion is stablized relatively with stopwatch measurement bead motion n circles time t used,
The cycle T that bead moves in a circle is obtained using the time and the number of turns of measurement, so as to calculate the angular velocity omega of conical pendu0, is substituted into public
Formula calculates the size of centripetal force；Simultaneously from the top of iron stand straight down from bead circular motion and which concentric circles weight
Close, this lower circle of mark, the radius r justified with ruler measurement markers；Length of the bead apart from hitch point is measured again, if accurate survey
Amount will also measure the diameter d of bead, and the radius of bead is included in pendulum length.According to by gravity and rope pulling force make a concerted effort provide centripetal
The principle of power, by making a concerted effort for Calculation and Analysis of Force pulling force and gravity.Using above-mentioned experimentation is repeated, compare with joint efforts and centripetal force
Size, finally draw experiment conclusion.
This experiment is all fine in terms of the property of may participate in of design, principle, method and student, but in actual mechanical process
Its lecture experiment but has the following disadvantages：1st, need the data measured many, have the quality m of bead, move in a circle radius
R, period of motion T, the height h in the center of circle to suspension point；2nd, due to being to use hand-motion bead, it is difficult to make bead along some circumference on paper
Motion, bead does elliptic motion mostly in the horizontal plane, therefore whether bead does uniform circular motion, can only carry out rough sentencing
Disconnected, its result is inaccurate；3rd, the measurement of radius r and cycle T can only be estimated；4th, used physical apparatus is relatively more：There is balance,
Graduated scale, stopwatch；5th, the physical quantity of required calculating is more, wire speed, folder tangent of an angle, centripetal force and make a concerted effort.In reality
During teaching demonstration, when carrying out specific experiment demonstration, if indiscriminately imitating the method described in teaching material completely, any change is not done
Become, then there are two place measurements very rough, due to not knowing for the center of circle, so that cause radius r measurement inaccurate, height h
Measurement also just it is inaccurate.Therefore it can not possibly only be completed on a class with the time of lecture experiment, even if finishing but result ten
Divide rough, possible error is very big.Therefore teacher also needs to make more explanation in teaching process, student occurs to experiment
Confidence level is not high, does not reach verification the verifying results.
The content of the invention
The technical problem to be solved in the present invention is to be suitable for physics teaching in secondary school there is provided one kind in view of the shortcomings of the prior art
The demonstration teaching aid used, with simple in construction, easy to use, specifically a kind of novel centripetal force checking device.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of novel centripetal force verifies device, including
Have including base and support, the lower end of the support is arranged on base, crossbeam is additionally provided with the middle and upper part of the support, in institute
Crossbeam is stated provided with small ball is connected with by hanging fine rule, laser leveler and Level tune are additionally provided with the base
Platform, the laser leveler is located on Level tune platform, also includes the power set for driving small ball to move.
Further, centripetal force checking device of the present invention, wherein the power set include buncher, speed governing
Controller and power switch, the buncher are arranged on crossbeam, and the speed setting controller and power switch are located on base,
Vertically downward, the output shaft end of the buncher is connected the output shaft of the buncher by hanging fine rule with small ball
Connect, the buncher is electrically connected by speed setting controller with power switch, control small ball to move by the buncher.
Further, centripetal force checking device of the present invention, wherein being provided with balance adjustment in the Level tune platform
Nut, the height for adjusting the Level tune platform is used for by the balance adjustment nut.
Using a kind of novel centripetal force checking device of the present invention, by being provided with what is moved for driving small ball
Power set and laser leveler, the rotation of buncher is controlled by speed setting controller, can guarantee that swing ball in the horizontal plane
The circular motion being near the mark is rotated, can directly judge whether bead moves in a circle using laser leveler, it judges phase
To accurate.Centripetal force checking device of the present invention has simple in construction, easy for operation, visual in image, the student of demonstration
Property of participation is strong, and a kind of novel teaching aid is provided for middle school physics teaching.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Shown in figure：1- bases, 2- supports, 3- crossbeams, 4- bunchers, 5- suspensions fine rule, 6- small balls, 7- laser waters
Level, 8- Level tunes platform, 9- balance adjustments nut, 10- speed setting controllers, 11- power switches.
Embodiment
In order to more fully explain the implementation of the present invention, the present invention is further illustrated below in conjunction with specific embodiment.Institute
Give an actual example and be served only for explaining the present invention, rather than limit the scope of the present invention.
As shown in figure 1, a kind of novel centripetal force checking device of the present invention, includes including base 1 and support 2,
The lower end of the support 2 is arranged on base 1, is additionally provided with crossbeam 3 in the middle and upper part of the support 2, is provided with the crossbeam 3
Small ball 6 is connected with by hanging fine rule 5, laser leveler 7 and Level tune platform 8 are additionally provided with the base 1, it is described to swash
Light level meter 7 is located on Level tune platform 8, also includes the power set for driving small ball 6 to move.
Further, centripetal force checking device of the present invention, wherein the power set include buncher 4, tune
Fast controller 10 and power switch 12, the buncher 4 are arranged on crossbeam 3, the speed setting controller 10 and power switch
12 are located on support 2, and vertically downward, the output shaft end of the buncher 4 passes through suspension to the output shaft of the buncher 4
Fine rule 5 is connected with small ball 6, and the buncher 4 is electrically connected by speed setting controller 10 with power switch 12, is adjusted by described
The control small ball 6 of speed motor 10 is moved.
Further, centripetal force checking device of the present invention, wherein being provided with balance adjustment in the Level tune platform 8
Nut 9, the height for adjusting the Level tune platform 8 is used for by balance adjustment nut 9.
Device is verified using centripetal force of the present invention, by doing following rational analysis to the experiment of former teaching material, due to this
The core of experiment is to verify mv with mgtan θ2/ r, because cycle T is direct measurement, can be made even with multiple measurement
Average, relatively accurately, then borrows the cycle（T）, according to the π r/T of V=2, original checking becomes checking mgtan θ=mr4 π2/
T2, wherein quality m is due to being that same bead can be omitted, and because of tan θ=r/h, then above formula be converted into checking gr/h=
r·4π2/T2, because r is same Radius, and because g is approximately equal to n2, then 1/N=4/T can be further simplified as2.In order that data
Analysis is easy to calculate, and can further be adjusted to verify T2=4h, thus makes experimental verification significantly easy, and feasible.It is logical
Above-mentioned optimization is crossed, the major advantage that it simplifies is as follows：
1st, the data of measurement greatly reduce, and only need to measure bead moves in a circle the cycle (T), and the height (h) in the center of circle to suspension point is
Can；
2nd, the instrument and meter used is less, only need to use graduated scale and stopwatch；
3rd, measurement data is relatively accurate, and the wherein cycle (T) can repeatedly measure average value, and the height (h) in the suspension point center of circle can be borrowed
Help laser leveler to measure；
4th, whether bead, which moves in a circle, directly to be judged by horizontal laser light instrument, and it judges relatively accurate.
In actual application, device is verified using centripetal force of the present invention, specifically used method is first will
Laser leveler 7 is positioned on Level tune platform 8, and is used to adjusting Level tune platform 8 by balance adjustment nut (9) and is made it be in
Horizontality, it is ensured that the spirit bubble of laser leveler 7 is located at center；Then small ball 6 is driven to move by power set,
Start laser leveler 7 simultaneously, no matter the small ball 6 that conical pendu0 is done in observation is all around shone by laser in laser leveler 7
Arrive, then it represents that small ball 6 has done uniform circular motion, then start recording cycle and height, finally bring formula into and tested
Card.After being improved to original lecture experiment, good effect is reached in being operated in classroom, classroom religion is being smoothly completed
While task, verify centripetal force formula high-efficiency high-quality.
Using a kind of novel centripetal force checking device of the present invention, by being provided with what is moved for driving small ball
Power set and laser leveler, the rotation of buncher is controlled by speed setting controller, can guarantee that swing ball in the horizontal plane
The circular motion being near the mark is rotated, can directly judge whether bead moves in a circle using laser leveler, it judges phase
To accurate.Centripetal force checking device of the present invention has simple in construction, easy for operation, visual in image, the student of demonstration
Property of participation is strong, and a kind of novel teaching aid is provided for middle school physics teaching.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalence replacement or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (3)
1. a kind of novel centripetal force verifies device, it is characterised in that：Include including base (1) and support (2), the support
(2) lower end is arranged on base (1), is additionally provided with crossbeam (3) in the middle and upper part of the support (2), is set on the crossbeam (3)
Have and be connected with small ball (6) by hanging fine rule (5), laser leveler (7) and Level tune are additionally provided with the base (1)
Platform (8), the laser leveler (7) is located on Level tune platform (8), also includes for driving the dynamic of small ball (6) motion
Power apparatus.
2. a kind of novel centripetal force checking device according to claim 1, it is characterised in that：The power set include
Buncher (4), speed setting controller (10) and power switch (11), the buncher (4) are arranged on crossbeam (3), described
Speed setting controller (10) and power switch (11) are located on base (1), the output shaft of the buncher (4) vertically downward, institute
The output shaft end for stating buncher (4) is connected by hanging fine rule (5) with small ball (6), and the buncher (4) is by adjusting
Fast controller (10) electrically connects with power switch (11), controls small ball (6) to move by the buncher (10).
3. a kind of novel centripetal force checking device according to claim 1, it is characterised in that：In the Level tune platform
(8) balance adjustment nut (9) is provided with, the height for adjusting the Level tune platform (8) is used for by the balance adjustment nut (9)
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719469.4A CN107293196A (en) | 2017-08-21 | 2017-08-21 | A kind of novel centripetal force verifies device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719469.4A CN107293196A (en) | 2017-08-21 | 2017-08-21 | A kind of novel centripetal force verifies device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107293196A true CN107293196A (en) | 2017-10-24 |
Family
ID=60107047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710719469.4A Pending CN107293196A (en) | 2017-08-21 | 2017-08-21 | A kind of novel centripetal force verifies device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107293196A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505794A (en) * | 2020-11-26 | 2021-03-16 | 合肥工业大学 | Intelligent gravity acceleration measuring instrument based on conical pendulum |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2798035Y (en) * | 2005-05-25 | 2006-07-19 | 来延安 | Laser flexible rule |
| CN203055252U (en) * | 2012-12-28 | 2013-07-10 | 刘召新 | A centripetal force demonstrator |
| CN105674966A (en) * | 2014-11-19 | 2016-06-15 | 南京德朔实业有限公司 | Laser emitting apparatus |
-
2017
- 2017-08-21 CN CN201710719469.4A patent/CN107293196A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2798035Y (en) * | 2005-05-25 | 2006-07-19 | 来延安 | Laser flexible rule |
| CN203055252U (en) * | 2012-12-28 | 2013-07-10 | 刘召新 | A centripetal force demonstrator |
| CN105674966A (en) * | 2014-11-19 | 2016-06-15 | 南京德朔实业有限公司 | Laser emitting apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 冯建跃: "利用圆锥摆验证向心力公式若干方案的比较和优化", 《物理教师》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112505794A (en) * | 2020-11-26 | 2021-03-16 | 合肥工业大学 | Intelligent gravity acceleration measuring instrument based on conical pendulum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104155111B (en) | The centering method of dolly centralising device built by a kind of electromotor | |
| CN203895007U (en) | Circular motion comprehensive experimental platform | |
| CN204165732U (en) | Full-automatic drop test device | |
| CN204791681U (en) | Simple pendulum method acceleration of gravity measuring device | |
| CN108847098A (en) | Physics experiment teaching apparatus for demonstrating | |
| CN207366545U (en) | Gravity casting simulates testing stand | |
| Vogt et al. | Acceleration sensors of smartphones | |
| CN107293196A (en) | A kind of novel centripetal force verifies device | |
| CN202549114U (en) | Electric centripetal force quantitative analysis demonstration instrument | |
| CN2922002Y (en) | Quantitative proofing tester for coulomb's law | |
| CN206177987U (en) | Angle acceleration measuring instrument | |
| CN201655100U (en) | Mechanics experiment platform | |
| CN206921349U (en) | A kind of lever used for physics instructional device | |
| CN103971566A (en) | Circular motion comprehensive-experiment platform | |
| CN205487021U (en) | Presentation device of survey sliding friction power | |
| CN106952542B (en) | Physical gravity experimental simulation device | |
| CN206379080U (en) | A kind of high school physicses force resolution apparatus for demonstrating | |
| CN203055252U (en) | A centripetal force demonstrator | |
| CN205862661U (en) | A kind of energy converts teaching demonstration device | |
| CN206115810U (en) | Centripetal force experimental apparatus | |
| CN206505631U (en) | A kind of high school physicses mechanics study apparatus for demonstrating | |
| CN211455024U (en) | Experimental device for exploring centripetal force size determining factors based on data | |
| CN106601086A (en) | Automatic verifying device for free fall experiments | |
| CN209496525U (en) | A kind of portable pendulum experiment displaying model | |
| CN107301811A (en) | A kind of novel three-dimensional adjustable quantitative verifies Double cone up rolling condition experiment instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171024 |