Method for demonstrating parabola containing periodic change factor

Abstract

The invention relates to a method for demonstrating a parabola containing a periodic change factor, which mainly comprises a water tank, a small red plastic ball, a guide ring, a compression spring, avertical guide rod, a motor, a speed change switch and a power supply, wherein the water tank consists of a group of parallel vertical wells with the bottom being communicated, the small red plasticball floats on the liquid level of the vertical wells, the compression spring is fixed to the bottom of the water tank, the other end of the compression spring is fixed to a homogenizing disc, a guidering is fixed to the side wall of the flat side of the water tank, a vertical guide rod matched with the inner diameter of the guide ring penetrates through the guide ring, scales are arranged on thevertical guide rod and used for observing the position of the guide ring, the vertical guide rod is fixed to the homogenizing disc, a rotating shaft of the motor penetrates through a central shaft ofthe homogenizing disc, that is, the central shaft of the water tank, the central shaft of the compression spring, the central shaft of the homogenizing disc and the rotating shaft of the motor are located on the same vertical line, and the liquid level change parabola law of rotating at a constant angular speed under a vertical periodic acceleration reference system can be demonstrated.

Description

technical field [0001] This patent relates to a parabola demonstration method with periodic variation factors, which belongs to the field of university mathematics and physics experiment instruments. Background technique [0002] The concept of a rotating parabola is often used in college physics classes and advanced mathematics classes. Especially for college students who are beginning to learn mechanics courses, it is difficult to prove that the liquid surface of a rotating liquid is a paraboloid, and it is difficult to understand. The inventor of this patent is also A series of studies are given in the literature [1], but some corresponding demonstration experiments are lacking. The existing technology mainly uses the Newton bucket experiment to study. Due to the viscosity of the liquid, it takes a long time for the rotating liquid to reach the same angular velocity, and the observation is relatively Difficult, also lacks the experimental demonstration of the interface (b...

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Problems solved by technology

[0002] The concept of a rotating parabola is often used in college physics classes and advanced mathematics classes. Especially for college students who are beginning to learn mechanics courses, it is difficult to prove that the liquid surface of a rotating liquid is a paraboloid, and it is difficult to understand. The inventor of this patent is also A series of studies are given in the literature [1], but some corresponding demonstration experiments are lacking. The existing technology mainly uses the Newton bucket experiment to study. Due to the viscosity of the liquid, it takes a long time for the rotating liquid to reach the same angular velocity, and the observation is relatively Difficult, also lacks the experimental demonstration of the interface (boundary line) law of the two immiscible liquids of synchronous rotation, for this reason the inventor of this patent has provided " a kind of mechanical experiment instrument of rotating paraboloid " and " a kind of demonstration of rotating variable parabola The method "effectively solves the demonstration problem of the conventional parabola, but the common feature of the current existing technology is the parabola or parabola demonstration of the liquid rotating at a certain angular velocity. People often discuss the influence of the change of the angular velocity on the parabola equation. The function form is single, which cannot meet the needs of further exploration, such as whether the rotating liquid surface is a parabolic liquid surface (parabola) in an acceleration reference system, and there is a lack of corresponding experimental demonstrations, especially in a periodic force field , what is the law of its parabolic equation

So far, no visible and credible demonstration experiment has been given for this problem. How to realize the demonstration experiment with rich demonstration content, obvious visual effect, and credible demonstration experiment apparatus and method, this patent will solve this problem

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