In a conventional pendulum experimental apparatus, the pendulum trajectory is disturbed during pendulum movement experiments, and even with a single pendulum having one pendulum attached to an experimental apparatus. There was also a textbook that states that if the pendulum hits the desk it will be re-entered. Also it was necessary to correctly understand the length of the pendulum which is the definition of the pendulum.Kind Code: A1 A pendulum hanger string has a cross-sectional shape of a conventional circular shape to a rectangular shape, and a pendulum motion is interlocked with an accurate and stable trajectory by interposing a fulcrum portion between two parallelly arranged angular channels You can do it. Moreover, by inserting the length scale of the pendulum in the hanging strap, correct understanding of the length of the pendulum, shortening of the experimental time and stable experimental data can be obtained.(FIG.
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