向心加速度演示仪设计制作与教学应用

Design and Application on Experimental Facility of Validating Centripetal Acceleration Formula

设计了由动力单元、调速单元、测速单元和测角度单元组成的实验装置,介绍了装置的组成与原理、教学应用方法及实验结果.该装置不但能形象直观地演示在匀速圆周运动中,向心加速度与角速度和半径的定性关系,而且可以定量验证匀速圆周运动向心加速度计算式a=ω^2r的正确性,从而加深学生对公式a=ω^2r的理解与记忆.

This experimental facility is composed of four parts: the power unit, velocity controlling unit, velocity measuring unit and angle measuring unit, which not only show the qualitative relationship of centripetal acceleration with angular speed and radius, but also verify the quantitative relationship of centripetal acceleration with angular speed and radius in uniform circular motion, thus it can help students to deepen their comprehension of formula. This article mainly introduces constitute, principle, methods and result of the experiment.