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8704(87日大)一木塊沿著一斜面以等加速度下滑

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Uploaded by on Jun 22, 2008

8704(87日大)一木塊沿著一斜面以等加速度下滑,若斜面的斜角為30 ,木塊沿斜面下滑的加速度為g/3(其中g為重力加速度),則動摩擦係數為_______。

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