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力学(英語:mechanics)是物理学的一个分支,主要研究能量和力以及它们与物体的平衡、变形或运动的关系。
隨著人们在日常劳动中使用杠杆、打水器具等次數的增多,而逐渐认识物体受力,及其平衡的情况...
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