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靜力學/測驗
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來自華夏公益教科書，開放的世界，開放的書籍
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靜力學
懸臂末端的力矩等於多少？ 解答：零
我們稱力系不是均衡穩定的時候是怎樣的？ 解答：當所有力的總和不等於零時
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書籍：靜力學
華夏公益教科書
