17.如图所示在一水平转台上放有质量相等可视为质点的ab两个物体用一轻杆相连ab连线沿半径方�a与平台间有�擦b与平台间的�擦可 Template




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tomski17.如图所示在一水平转台上放有质量相等可视为质点的ab两个物体用一轻杆相连ab连线沿半径方�a与平台间有�擦b与平台间的�擦可 coloring