5.1: 牛顿运动定律前奏
- Page ID
- 205038
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当你开车过桥时，你期望它保持稳定。 您还希望在交通变化时加速或减速您的汽车。 在这两种情况下，你都要对付力量。 桥上的力处于平衡状态，因此它保持原位。 相比之下，汽车发动机产生的力会导致运动发生变化。 艾萨克·牛顿发现了描述这些情况的运动定律。
力量影响你生命中的每一刻。 你的身体被力量固定在地球上，并被带电粒子的力量固定在一起。 当你打开一扇门、走在街上、抬起叉子或触摸宝宝的脸时，你是在施加力量。 放大得更深，你身体的原子由电力连接在一起，而原子的核心，称为原子核，由我们所知道的最强的力量 —— 强大的核力量 —— 结合在一起。