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弹簧什么时候做正功负功
更新时间: 2020-07-13 00:00:00  

如果弹力对物体来说是动力,就是做正功,反之,如果弹力对物体来说是阻力,那么就说弹力做负功。

弹簧是一种利用弹性来工作的机械零件。用弹性材料制成的零件在外力作用下发生形变,除去外力后又恢复原状。亦作“ 弹簧 ”。一般用弹簧钢制成。弹簧的种类复杂多样,按形状分,主要有螺旋弹簧、涡卷弹簧、板弹簧、异型弹簧等。

关键词: 弹簧 什么 时候

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