质量为m的a球与质量为m的b球分别连接在轻质弹簧的两端如图5所示b球用平行于斜面的细线固定在倾角为30的光�斜面上ab球处于静止状态 Template




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tomski质量为m的a球与质量为m的b球分别连接在轻质弹簧的两端如图5所示b球用平行于斜面的细线固定在倾角为30的光�斜面上ab球处于静止状态 coloring