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Moment sudden change angle momentum conservation demonstration apparatus

A technology of conservation of angular momentum and a demonstration instrument, which is applied in the field of university physics teaching experiment instruments

Inactive Publication Date: 2005-02-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these are not enough, teaching practice requires more in-depth demonstration experiments

Method used

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  • Moment sudden change angle momentum conservation demonstration apparatus
  • Moment sudden change angle momentum conservation demonstration apparatus
  • Moment sudden change angle momentum conservation demonstration apparatus

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Embodiment Construction

[0008] Embodiments are described below with reference to the drawings. The instrument is composed of three major parts: a ball rod system 3 that can rotate around a fixed point, a wire guide 4 and a flexible wire 5, and a support system including a frame 2 and a base 1 (see figure 1 , 2 ). Such as Figure 4 As shown, the ball rod system 3 is composed of a thin rod connecting two steel balls 7 and 9, and a precision spherical bearing 8 is installed at the midpoint of the thin rod, so when the spherical body of the spherical bearing is supported by a strut 10 , the club system can rotate around the center of the spherical bearing 8 with limited fixed-point rotation (the club system can perform fixed-point rotation in the horizontal plane or in an inclined state at a certain angle with the horizontal plane), and the pole 10 supporting the club system is installed On the base 1; the thread guide 4 is a tubular part with smooth pores 12 (see Figure 5 ), which is fixed on frame...

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Abstract

The demo-instrument consists of a ball rod system rotatable around a fixed-point, part for leading wire and flexible wire, and support system. The ball rod system is composed of a thin pole connected to two steel balls. Precision spherical bearing is installed in middle point of the thin pole. Thus, when the spherical bearing is supported by a support bar, the ball rod system can make limited rotation around a fixed point with center of the spherical bearing. The part for leading wire fixed on frame is a tubular part possessing a smooth slim hole. The hole must be positioned at the extension line of the support bar for supporting the ball rod system. A flexible thin wire cross the slim hole is connected to one end of thin pole.

Description

technical field [0001] The patent of the invention relates to an instrument for demonstrating the conservation of angular momentum when the torque changes abruptly, and belongs to the field of university physics teaching experiment instruments. Background technique [0002] Angular momentum is a difficult concept to understand in college physics classes. Over the years, in order to help students correctly understand this concept, some demonstration experiments have been set up in conjunction with the teaching of angular momentum, such as the Zhukovsky swivel chair demonstrating the conservation of angular momentum when the moment of inertia changes, and the wheel turntable demonstrating the angular momentum under the action of internal torque conservation etc. But these are not enough, teaching practice requires more in-depth demonstration experiments. This instrument was invented to meet this requirement. Contents of the invention [0003] The purpose of the present in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/10
Inventor 路峻岭汪荣宝高炳坤
Owner TSINGHUA UNIV