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Experimental demonstrating device for law of conservation momentum

An experimental device and technology of conservation of momentum, applied in educational appliances, instruments, teaching models, etc., can solve the problems of lack of perceptual understanding of the law of momentum conservation, unfavorable students' understanding of phenomena, establishment of concepts and laws, etc., and achieve easy material acquisition and low cost Effect

Inactive Publication Date: 2004-12-08
信亚君
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] The traditional way of teaching the law of conservation of momentum in middle school physics teaching is to derive the law of conservation of momentum from Newton's second law and Newton's third law; because there is no teacher's demonstration experiment in this traditional way, many students lack sensitivity to the derived law of conservation of momentum Recognition is not conducive to students' smooth understanding of phenomena, establishment of concepts and laws, and application of laws to solve specific problems; besides, the law of conservation of momentum is not attached to Newton's second and third laws, and it is independent and has an experimental basis. laws of physics

Method used

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  • Experimental demonstrating device for law of conservation momentum
  • Experimental demonstrating device for law of conservation momentum

Examples

Experimental program
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Embodiment Construction

[0009] Place the glass tube (1) on the wooden frame (4) shown in the figure so that it is placed horizontally. Use a slender iron wire to poke two matches (2), (3) into the middle of the glass tube (1), put the alcohol lamp (5) under the glass tube (1), light the alcohol lamp (5), and rotate Glass tube (1) makes it evenly heated. When the temperature at the match head in the tube reaches the ignition point of the match head, the two matches burn simultaneously, fly out from the two ports of the glass tube (1) respectively, and fall to the two ends of the horizontal platform.

[0010] The key to the test is to find several matches whose outer diameter is "slightly smaller" than the inner diameter of the thin glass tube. The standard of "slightly less than" is: when the match is inserted into the glass tube, the resistance of the match head to the tube wall is very small. In addition, tell the students that during the experiment, pay attention to the position where the match f...

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Abstract

Two pieces of matches are put inside glass tube on a bracket. Using alcohol burner heats up wall of the glass tube till temperature of matches' heads reaches to burning point. Thus, two matches are lighted up, and sticks of matches are flown off from two ends of the glass tube and dropped at plane table in equal distances to relevant end of glass tube.

Description

Technical field: [0001] The invention relates to a teaching experiment device, in particular to a demonstration experiment device for the law of conservation of momentum. Background technique: [0002] The traditional way of teaching the law of conservation of momentum in middle school physics teaching is to derive the law of conservation of momentum from Newton's second law and Newton's third law; because there is no teacher's demonstration experiment in this traditional way, many students lack sensitivity to the derived law of conservation of momentum Recognition is not conducive to students' smooth understanding of phenomena, establishment of concepts and laws, and application of laws to solve specific problems; besides, the law of conservation of momentum is not attached to Newton's second and third laws, and it is independent and has an experimental basis. laws of physics. Invention content: [0003] The purpose of the present invention: to provide an experimental de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/06
Inventor 信亚君
Owner 信亚君
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