033探究向心力大小与半径、角速度、质量的关系实验及其创新设计 精讲精练-2022届高三物理一轮复习疑难突破微专题
033探究向心力大小与半径、角速度、质量的关系实验及其创新设计一.必备知识1.实验目的:(1)学会使用向心力演示器;(2)通过实验探究向心力与半径、角速度、质量的关系。2.实验仪器:向心力演示器(如图),三个金属球(半径相同,其中两个为质量相同的钢球,另一个为质量是钢球一半的铝球)。3.实验原理如图所示,匀速转动手柄1,可以使变速塔轮2和3以及长槽4和短槽5随之匀速转动,槽内的小球也随着做匀速圆周运动。使小球做匀速圆周运动的向心力由横臂6的挡板对小球的压力提供。球对挡板的反作用力,通过横臂的杠杆作用使弹簧测力套筒7下降,从而露出标尺8。根据标尺8上露出的红白相间等分标记,可以粗略计算出两个球所...
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