Balance swing rod and starting drive thereof

Abstract

The invention relates to an experimental apparatus, particularly to a balance swing rod and a starting device thereof. A compound pendulum swing rod without initial shaking is composed of a swing rod hole, a balance groove and a rod body; the starting device is composed of a gear, a rotating shaft, a gear carrier, a tooth bar, a drop arm, a knob, a table edge card, a transverse arm and a positioning hook; the lower end of the rod body is provided with the balance groove with a V-shaped cross section; the gear is sleeved on the rotating shaft and generates a running fit with the rotating shaft; the upper surface of the table edge card between two gear carriers is provided with the tooth bar which generates a running fit with the table edge card; the teeth of the tooth bar are upwards and engage with the teeth of the rotating shaft; one end of the tooth bar is provided with the L-shaped hook which is composed of the drop arm, the transverse arm and the positioning hook; and the sharp end of the positioning hook is of a triangular pyramid shape. The experimental apparatus prevents the experiment error caused by hand shaking and increase the accuracy of experiment result.

Description

technical field [0001] The invention relates to an experimental instrument, in particular to a balanced pendulum and a starting device. Background technique [0002] In the experiment process of using the compound pendulum to measure the acceleration of gravity, it is necessary to rotate the lower end of the compound pendulum bar to a certain height by hand and then let go. Because at the moment of releasing the pendulum, the human hand is prone to slight shaking, which will cause the pendulum to twist while swinging. Such twisting will consume a certain amount of kinetic energy, which will undoubtedly affect the swing of the compound pendulum. period, further increasing the error value of the measurement result. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the invention provides a balanced pendulum and a starting device which can eliminate the initial vibration of the compound pendulum. [0004] The solution to solve the techni...

AI Technical Summary

Problems solved by technology

Because at the moment of releasing the pendulum, the human hand is prone to slight shaking, which will cause the pendulum to twist while swinging. Such twisting will consume a certain amount of kinetic energy, which will undoubtedly affect the swing of the compound pendulum. period, further increasing the error value of the measurement result

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