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The method for validating the angle momentum conversation law with the linear speed

A technology of angular momentum conservation and law, applied in educational appliances, instruments, teaching models, etc., can solve problems such as difficulty in controlling the falling time of heavy balls and failure of experiments

Inactive Publication Date: 2007-08-15
LIAONING NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0007] However, in the test, the falling of the heavy ball caused the friction between the concave disc and the air-cushion turntable to increase suddenly, and the rotation speed of the concave disc decreased rapidly. Due to the experimental method, the systematic error of the air-cushion turntable and the limitations of the experimenter's operation, it was difficult to control The falling time of the heavy ball is in a critical state, and the experimental error is as high as about 30%, which leads to the failure of the experiment

Method used

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  • The method for validating the angle momentum conversation law with the linear speed
  • The method for validating the angle momentum conversation law with the linear speed
  • The method for validating the angle momentum conversation law with the linear speed

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Embodiment Construction

[0025] In conjunction with the accompanying drawings, the new method is described in detail as follows:

[0026] As shown in the figure, the angular momentum measuring instrument is mainly composed of the main body (air cushion turntable), air supply system (air compressor or air pump), photoelectric system, pulley and so on.

[0027] After the gas provided by the gas source 10 (air compressor or air pump) is input from the air inlet, it is ejected from the upper surface of the air chamber and the air hole inside the fixed disk 8 . The gas ejected from the air chamber lifts up the moving disk 7, and then the moving disk rotates with a fixed axis. When measuring the angular momentum of the object system, the moving disk is replaced by a concave disk. The falling metal ball 5 can be controlled by the cylindrical locator, so that the centering drop of the heavy ball coincides well with the concave disc. The bar-shaped light blocking sheet 6 is installed on the concave disc, and...

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Abstract

This invention relates to one liner speed test angle motion energy constant rules method in experiment method, which is applied in experiment and teach process, wherein, the method is to use cushion pad rotation test weight ball dropping angle motion energy; it fixes the bar light block slice in width of 5 to 8 mm into rotation disc with two near photo electricity gates; the bar light block slice linear speed method is to test angle motion constant rules.

Description

1. Technical field [0001] The method of using linear velocity to verify the law of conservation of angular momentum is an invention of an experimental method, that is, the method of measuring linear velocity by using a bar-shaped light barrier, which is mainly used in experiments and teaching processes. With this method, the verification of angular momentum and its conservation law can be successfully demonstrated and measured, which greatly reduces the experimental error. 2 background technology [0002] At present, there are many kinds of instruments and methods used to verify the law of conservation of angular momentum. The air-cushion turntable is the latest instrument that appeared in China after 2000. It adopts the latest technology and design and U-shaped light-shielding sheet to measure the angular velocity. [0003] According to the law of conservation of angular momentum, when the resultant external torque on a rigid body is zero, the value of its angular momentum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/06
Inventor 周风琴杨婧孙强
Owner LIAONING NORMAL UNIVERSITY
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