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Rotation theorem demonstrating instrument

A demonstrator and theorem technology, which is applied in the field of demonstrator about rotation theorem in physics teaching, can solve the lack of problems and achieve the effect of simple structure

Inactive Publication Date: 2015-09-30
NANJING XINHUI SCI & TEACHING INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in physics teaching, the teaching about the rotation theorem can only be learned theoretically, and there is a lack of an instrument that can directly observe and vividly display the rotation theorem

Method used

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  • Rotation theorem demonstrating instrument
  • Rotation theorem demonstrating instrument

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Embodiment Construction

[0010] Such as figure 1 The demonstrator of the rotation theorem includes a bottom plate 1, two rotating devices are installed on the bottom plate 1, and each rotating device is connected to a stretching device by an iron wire; the rotating device includes a shaft sleeve 2 mounted on the bottom plate, and a shaft sleeve 2 A shaft 4 is installed through the bearing A 3, a rotating wheel 5 is sleeved in the middle of the shaft, a swing rod 6 is fixed at the upper end of the shaft, and a rotating ball 7 is installed at both ends of the swing rod; the stretching device includes two supports fixed on the bottom plate A rotating shaft 9 is fixed on the upper end of the two supporting plates through a bearing B 10, and a stretching wheel 8 is sleeved on the rotating shaft 9. The stretching wheel 8 is provided with an iron wire 11 connected to the rotating wheel 5, and the lower end of the iron wire 11 is provided with Weight 12.

[0011] The weight 12 drives the rotating wheel 5, and th...

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Abstract

The invention discloses a rotation theorem demonstrating instrument which comprises a bottom plate. Two rotating devices are mounted on the bottom plate, each rotating device is connected with a stretching device through an iron wire and comprises a shaft sleeve mounted on the bottom plate, the shaft sleeves are provided with shafts through bearings A, rotating wheels are mounted in the middles of the shafts in a sleeving manner, swinging rods are fixed at the upper ends of the shafts, rotating balls are mounted at two ends of each swinging rod, the stretching device comprises two supporting plates fixed on the bottom plate, rotating shafts are fixed at the upper ends of the two supporting plates through bearings B, stretching wheels are mounted on the rotating shafts in a sleeved manner, iron wires are arranged on the stretching wheels and connected with the rotating wheels, and weights are arranged at the lower ends of the iron wires.

Description

Technical field [0001] The invention relates to a teaching instrument, in particular to a demonstration instrument for the rotation theorem in physics teaching, belonging to the field of teaching instruments. Background technique [0002] Rotation theorem: M=Ja. The angular acceleration of a rigid body rotating on a fixed axis is proportional to the total external moment it receives, and inversely proportional to the rigid body’s moment of inertia. Moment of inertia: the sum of the product of the mass of each particle on a rigid body and the square of the distance from each particle to the axis of rotation. Moment: The product of the force acting on a rigid body and the distance from the rigid body to the axis of rotation. At present, in physics teaching, the teaching about the rotation theorem can only be studied theoretically, and there is no instrument that can directly observe and vividly display the rotation theorem. Summary of the invention [0003] The purpose of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/10
CPCG09B23/10
Inventor 王良伟
Owner NANJING XINHUI SCI & TEACHING INSTR
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