Variable pendulum ball spring serpentine pendulum

Abstract

The invention relates to a variable pendulum ball-spring snakelike pendulum, which comprises an instrument support, N springs with the same stiffness coefficient, N butterfly nuts, and N pendulum balls, wherein the pendulum balls are identical in diameter and different in mass, the mass ratio of adjacent pendulum balls is m[n] / m[n+1]=(i+1)<2> / i<2>, the i is positive integer which is greater than 0, and the N is a positive integer which is greater than 5; each of the butterfly nuts is connected with the upper end of the spring, each of the springs is connected with the pendulum ball, the pendulum balls are suspended on the instrument support at equal intervals, and the gravity centers of the pendulum balls under an initial stationary state are located on the same horizontal line. The N pendulum balls are uplifted for a certain distance and then loosed simultaneously, the pendulum balls carry out simple harmonic vibration of their own, present a snakelike shape at a certain moment, return back to the initial positions after a certain period of time, and then start a next round of swinging.

Description

Technical field: [0001] The patent of the present invention relates to a physics teaching demonstration instrument, especially a pendulum demonstration instrument. Background technique: [0002] The period of a simple pendulum is only related to the length of the pendulum, that is, the period is proportional to the square root of the pendulum length. The cycloids of the current serpentine pendulums are of fixed length and shorten regularly, so the period of all simple pendulums also decreases regularly. In terms of the size of the swing angle, the swing angle also becomes smaller regularly. Therefore, after starting to swing, at first, because the angle difference is not large, and the difference is regular, it looks like a wavy serpentine swing. After oscillating many times, the variance gradually increases, and it seems to be messy. After continuing to swing, a serpentine swing can occur again. [0003] Vertical hanging spring simple pendulum is to hang a spring, and t...

AI Technical Summary

Problems solved by technology

The cycloids of the current serpentine pendulums are of fixed length and shorten regularly, so the periods of all pendulums are also regularly shortened

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