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出自维基百科,自由个百科全书

(英语:work),也叫机械功,是物理学中表示力对位移个累积个物理量,指从一种物理系统到另一种物理系统个能量转变,尤其是指通过使物体朝向力个方向移动个力个作用下头能量个转移。搭机械能相似个是,功也是标量,国际单位制单位为焦耳。

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