Centripetal force experiment apparatus

Abstract

In order to quickly and accurately measure the centripetal force and better verify a centripetal force formula, the present invention provides a centripetal force experiment apparatus, which relates to a middle school physics teaching and experimental instrument. According to a design scheme provided by the present invention, the number of shading times and the shading time required for dynamic measurement are automatically measured by a timer, and the tension of a cycloid to a pendulum ball and the position number of a pointer of a spring balance when rotating are directly read on a dial of the fixed spring balance. The experiment adopts a dynamic static experimental reading mode, reduces the difficulty of obtaining experimental data, improves the operability of the experiment, can be combined with traditional experiments, and is more conducive to the development of experimental inquiry teaching.

Description

technical field [0001] The invention relates to a middle school physics teaching and experiment instrument, in particular to a centripetal force experiment device. Background technique [0002] In the "Centripetal Force" section of "Physics" Compulsory 2 (Personal Education Edition) in senior high school, the experiment to verify the expression of centripetal force is the conical pendulum. The conical pendulum experiment is too abstract for students to understand, and there are obvious deficiencies in actual operation. It is difficult to make the ball move along a certain circle on the paper by hand, and the ball mostly moves in an ellipse on the horizontal plane; when the ball moves in a circle, there is a certain distance from the paper surface, which cannot be determined On which circle it is moving, there is a large error between the measured radius and the actual radius of the ball; and the movement time and number of circles of the conical pendulum depend on the studen...

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Problems solved by technology

[0002] In the "Centripetal Force" section of "Physics" Compulsory 2 (Personal Education Edition) in senior high school, the experiment to verify the expression of centripetal force is the conical pendulum. The conical pendulum experiment is too abstract for students to understand, and there are obvious deficiencies in actual operation. It is difficult to make the ball move along a certain circle on the paper by hand, and the ball mostly moves in an ellipse on the horizontal plane; when the ball moves in a circle, there is a certain distance from the paper surface, which cannot be determined On which circle it is moving, there is a large error between the measured radius and the actual radius of the ball; and the movement time and number of circles of the conical pendulum depend on the students to measure and judge with the stopwatch and the naked eye. The experimental error is relatively large, and the students can only be Forced to accept experimental conclusions without understanding, the effect of teaching is not very ideal

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