长为l的细线,拴一质量为m的小球,一端固定于o点.让其在水平面内做匀速圆� 运动这种运动通常称为圆锥�运动,如图5所示.当�线l与竖直方� Template




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tomski长为l的细线,拴一质量为m的小球,一端固定于o点.让其在水平面内做匀速圆� 运动这种运动通常称为圆锥�运动,如图5所示.当�线l与竖直方� coloring