�心力演示器如图所示.转动手柄1可使变速塔轮2和3以及长槽4和短槽5随之匀速转动.皮带分别套在塔轮2和3上的不同圆盘上可使两个槽内的小球 Template




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tomski�心力演示器如图所示.转动手柄1可使变速塔轮2和3以及长槽4和短槽5随之匀速转动.皮带分别套在塔轮2和3上的不同圆盘上可使两个槽内的小球 coloring