Detector for interaction force between objects

Abstract

The invention discloses a detector for interaction force between objects, which comprises two magnets, and is characterized in that: the two magnets are circular magnets of which the middle parts are provided with holes; the two magnets are sleeved on a horizontal rod through the holes on the middle parts; and two ends of the horizontal rod are supported by a bracket. The two circular magnets are sleeved on the horizontal rod; when like magnetic poles are adjacent, the two magnets move equal distance outwards, namely both an acting force and a reacting force are present and are equal; and when unlike magnetic poles are adjacent, the two magnets move inwards to a central line, and both the acting force and the reacting force are present and are equal. The detector for the interaction force between objects can simultaneously research the direction and magnitude of the acting force and the reacting force in an experiment, and can be used for teaching two sections of contents of the presence of interaction force between objects and mutual exclusion of like magnetic poles and attraction of unlike magnetic poles. The detector has the advantages of simplifying thinking and reducing the understanding difficulty for students, along with reliable phenomena, simple device and easy popularization.

Description

Technical field [0001] The invention relates to a teaching instrument, in particular to an instrument for exploring the interaction force between objects. Background technique [0002] In the exploration of "force" and "the effect of force is mutual" in the current Shanghai version of the second-year physics textbook, teachers often do experiments such as: hanging a bar magnet A with a thin wire, holding another bar magnet B , when the magnetic poles with the same name are close, the suspended magnet A rotates away from the direction, indicating that the hand-held magnet B has a forward thrust on the suspended magnet A; if the two magnets are exchanged, the magnetic poles with the same name are still close, and the suspended magnet B will be found It will also rotate in the direction away from it, indicating that magnet A also has a forward thrust on magnet B, trying to explain that: magnet A has a strong effect on magnet B, and in turn, magnet B also has a strong effect on ...

AI Technical Summary

Problems solved by technology

[0005] In particular, it needs to be pointed out that: the asynchronous nature of the above-mentioned experiments has caused indirectness and jumping in thinking, which is a problem that has not been discovered by the majority of educators for a long time, so no similar reports have been seen in any media. The existence of a class of experiments is probably one of the deep-seated reasons why students feel that physics is difficult to learn.

[0006] The reason for the above-mentioned difficulty in thinking is: if the two magnets are suspended, the two magnets will immediately attract together under the action of the force between the magnetic poles due to the large degree of freedom, or the rotation reaction of a certain magnet. At most, it can only be studied that there is mutual attraction between magnetic poles with different names, but it is impossible to study whether there is mutual repulsion between magnetic poles with the same name.

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