�块随转动圆盘一起转动,圆盘转动角速度逐渐增大,�块出现相对�动后做离心运动,�擦力的大小和方�怎样? 知乎 Template




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tomski�块随转动圆盘一起转动,圆盘转动角速度逐渐增大,�块出现相对�动后做离心运动,�擦力的大小和方�怎样? 知乎 coloring