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Experiment demonstration device for measuring relation between friction force and tensile force

A demonstration device and friction force technology, which are applied in the field of experimental demonstration devices for measuring the relationship between friction force and tension force, can solve problems such as affecting students' understanding of friction force, and achieve strong repeatability, simple structure and good stability. Effect

Inactive Publication Date: 2014-09-03
陈懋荣
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of this experimental method are: what is displayed on the computer screen is the image of the law of friction with time, that is, the f-t image, rather than the image of the law of friction with the size of the tension, that is, the f-F image, which directly affects students. understanding of friction

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  • Experiment demonstration device for measuring relation between friction force and tensile force

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Embodiment Construction

[0020] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0021] Please also refer to figure 1 , as shown in the figure, the experimental demonstration device for measuring the relationship between friction and tension of the present invention includes a base 1, a friction platform 2, a tension guide rail 3, a test block 4 and a sensing device; the friction platform 2 includes a horizontal panel 21 and a fixed bracket 22, the fixed bracket 22 is installed on the base 1, the horizontal panel 21 is hooked on the fixed bracket 22 and keeps the board level, the fixed bracket 22 and the fixed bracket 22 can be inverted L-shaped Rods (may also be arched rods and the like), the horizontal panel 21 can be vertically suspended and fixed on two inverted L-shaped rods through four thin lines (or hung on the...

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Abstract

The invention discloses an experiment demonstration device for measuring a relation between a friction force and a tensile force. The device comprises a base, a friction platform, a tensile force guide rail, a testing wood block and a sensing device, wherein the friction platform comprises a horizontal panel and a fixed bracket; the tensile force guide rail is of an arc structure; one end of the tensile force guide rail is fixed on the base and the other end of the tensile force guide rail is arranged on one side of the horizontal plane; the testing wood block is arranged on the horizontal plane; a small ball is fixed at one end of the testing wood block by a pull wire; the sensing device comprises two force sensors; one force sensor is arranged on the testing wood block and the other force sensor is fixed on the base by the bracket and is connected with the other side, opposite to the tensile force guide rail, of the horizontal panel through the pull wire. The experiment demonstration device has the benefits of having the advantages of simple structure, convenience for operation, visualized and obvious phenomenon, high stability, strong repeatability and the like when fulfilling the experiment aim.

Description

technical field [0001] The invention relates to a teaching demonstration device, in particular to an experimental demonstration device for measuring the relationship between frictional force and pulling force. Background technique [0002] Friction is one of the emphases and difficulties of high school physics teaching content. Among them, the magnitude of static friction changes with the magnitude of the tension, while the magnitude of sliding friction remains unchanged with the magnitude of the tension, which is even more difficult for students to understand. The best way to break through this difficulty is to let students explore independently and gain personal experience through experiments. At present, a better experimental method is: let the force sensor be fixed first, and the tension side hook at the other end is connected with the slider placed on the horizontal long wooden board through a thin line, and then drag the horizontal wooden board. Since the slider is i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/10
Inventor 陈懋荣陈新光
Owner 陈懋荣
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