5.如图所示oa为一遵守胡克定律的橡皮条其一端固定在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橡皮条处在竖直 Template




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tomski5.如图所示oa为一遵守胡克定律的橡皮条其一端固定在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橡皮条处在竖直 coloring