如图9所示oa为一遵循胡克定律的弹性轻绳其一端固定于天花板上的o点另一端与静止在动�擦因数恒定的水平地面上的�块a相连当绳处于竖直位置 Template




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tomski如图9所示oa为一遵循胡克定律的弹性轻绳其一端固定于天花板上的o点另一端与静止在动�擦因数恒定的水平地面上的�块a相连当绳处于竖直位置 coloring