Newton first law demonstrating instrument

A technology of Newton's first law and a demonstrator, which is applied in the field of teaching instruments, can solve the problems that the car is easy to deviate, cannot objectively reflect the effect of the friction surface, and affects the accuracy of experimental data, etc., and achieves the effect of convenient observation

Inactive Publication Date: 2015-07-01
姚爱民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the original method has been improved, there are still some problems: first, the use of small cars for experiments cannot objectively reflect the effect of the friction surface due to the influence of internal friction; second, the release of small cars is difficult to synchronize; third, small cars are easy to run The wheel rubs against the edge, which seriously affects the accuracy of the experimental data; Fourth, the observation effect of the experiment is limited and cannot be adapted to the audio-visual teaching

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: Newton's first law demonstrator, including the table body 8 that there is difference in height at both ends, is located on the table body 8 and has several slideways 4 with different coefficients of friction, and described slideway 4 is suitable for small The ball rolls along a straight line, a small ball synchronous applicator is provided at the high end of the table body 8, and a camera 6 connected to the audio-visual teaching equipment is provided at the low end of the table body 8.

Embodiment 2

[0012] Embodiment 2: Newton's first law demonstrator, including the platform body 8 that there is difference in height at both ends, is located on the platform body 8 and has several slideways 4 with different friction coefficients, and described slideway 4 is suitable for small The ball rolls along a straight line, and a small ball synchronous applicator is provided at the high end of the table body 8. The small ball synchronous applicator consists of a bracket 1 fixed on the high end surface of the table body 8, and a small ball spliced ​​with the bracket 1. The synchronous release plate 3 and the handle 2 arranged on the fixed frame of the release plate 3 are formed. A camera 6 connected to the audio-visual teaching equipment is provided at the lower end of the table body 8 .

Embodiment 3

[0013] Embodiment three: Newton's first law demonstrator, comprises the platform body 8 that one end is high, one end is low, and platform body 8 can be formed by seamless connection of two sections, and the slope height of front section is about 8-15 centimeters, and length is about 10-10 centimeters. 25 centimeters, the slope height of the rear section is about 0-5 centimeters, the length is about 80-150 centimeters, and the total length is about 180 centimeters. The table body 8 is provided with slideways 4 with different friction coefficients and suitable for small balls to roll along a straight line. -1, 4-2, 4-3, 4-4, the width of the chute is slightly larger than the diameter of the ball, about 20 mm, the side surface of the chute should be smooth, the ball 5-1, 5-2 , 5-3, and 5-4 have the same size, quality, and coefficient of friction, but have obvious differences in color and are different from each other. The high-end place of described table body 8 is provided with...

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Abstract

The invention provides a newton first law demonstrating instrument, and relates to a teaching instrument. The newton first law demonstrating instrument comprises a table body of which two ends have different height, and a chute which is formed in the table body and has a plurality of frictional coefficients. The newton first law demonstrating instrument is characterized in that the chute is suitable for a small ball to linearly roll; a small ball synchronizing applying device is arranged at the high end of the table body; a camera connected with an audio-visual education device is arranged at the low end of the table body. According to the newton first law demonstrating instrument, the small ball is used as an experimental object; the influence of the frictional force outside the chute surface can be avoided; the experimental result is accurate; the instrument can be connected with a computer and a projection device, which facilitates experimental observing; the instrument is applicable to audio-visual education.

Description

technical field [0001] The invention relates to a teaching instrument. technical background [0002] Newton's first law is an important content of junior high school physics teaching. To enable students to fully understand the relationship between force and motion, it must be demonstrated with the help of teaching instruments. However, there is no special Newton's first law demonstrator in teaching now, and it is often difficult to obtain satisfactory results by using local materials for simple demonstrations. "Experimental Teaching and Instruments" No. 1, 2010, published Zhang Jian's "Improvement of Newton's First Law of Motion Demonstrator", which is to set three lanes on the skateboard, such as towel surface, cardboard surface, and wooden board surface. Set up a trolley on the ground, and compare the sliding speed of the trolley on surfaces with different friction coefficients by releasing the trolley at the same time. Although the original method has been improved,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/10
CPCG09B23/08
Inventor 姚爱民刘胜辉
Owner 姚爱民
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