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牛顿第二定律与自由体图
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大家好 今天我们学习 牛顿第二定律 F = ma Hello everyone
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, today we are learning Newton ’ s Second
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Law , F = ma . 这个公式表示 物体的加速度 由它所受的合
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力决定 This formula means an object ’ s acceleration
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is determined by the net force acting on it . 质量 m表
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示物体的重量 加速度 a表 示速度变化的 快慢 Mass m shows
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how heavy the object is , and acceleration a shows
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how fast its velocity changes . 为了分析力
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