1.两个物体处于静摩擦时,有无摩擦力?2.为什么物体的重心可能不在物体上?{请举例}3.物体B拉着物体A匀速直线运动,此时拉力为3N,当物体B突然消失{可以把它想成撞到墙上了,不再拉着A了}后,物
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![1.两个物体处于静摩擦时,有无摩擦力?2.为什么物体的重心可能不在物体上?{请举例}3.物体B拉着物体A匀速直线运动,此时拉力为3N,当物体B突然消失{可以把它想成撞到墙上了,不再拉着A了}后,物](/uploads/image/z/6392875-67-5.jpg?t=1.%E4%B8%A4%E4%B8%AA%E7%89%A9%E4%BD%93%E5%A4%84%E4%BA%8E%E9%9D%99%E6%91%A9%E6%93%A6%E6%97%B6%2C%E6%9C%89%E6%97%A0%E6%91%A9%E6%93%A6%E5%8A%9B%3F2.%E4%B8%BA%E4%BB%80%E4%B9%88%E7%89%A9%E4%BD%93%E7%9A%84%E9%87%8D%E5%BF%83%E5%8F%AF%E8%83%BD%E4%B8%8D%E5%9C%A8%E7%89%A9%E4%BD%93%E4%B8%8A%3F%7B%E8%AF%B7%E4%B8%BE%E4%BE%8B%7D3.%E7%89%A9%E4%BD%93B%E6%8B%89%E7%9D%80%E7%89%A9%E4%BD%93A%E5%8C%80%E9%80%9F%E7%9B%B4%E7%BA%BF%E8%BF%90%E5%8A%A8%2C%E6%AD%A4%E6%97%B6%E6%8B%89%E5%8A%9B%E4%B8%BA3N%2C%E5%BD%93%E7%89%A9%E4%BD%93B%E7%AA%81%E7%84%B6%E6%B6%88%E5%A4%B1%7B%E5%8F%AF%E4%BB%A5%E6%8A%8A%E5%AE%83%E6%83%B3%E6%88%90%E6%92%9E%E5%88%B0%E5%A2%99%E4%B8%8A%E4%BA%86%2C%E4%B8%8D%E5%86%8D%E6%8B%89%E7%9D%80A%E4%BA%86%7D%E5%90%8E%2C%E7%89%A9)
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