一个小球A用l=0.8m的轻质不可伸长的细绳悬于以速度v=4m/s向右匀速运动的小车顶部,由于某种原因,小车突然停止.(g=10m/s^2)问:(1)小车停止瞬间,小球怎样运动(2)小车停止瞬间,绳的拉力F1
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![一个小球A用l=0.8m的轻质不可伸长的细绳悬于以速度v=4m/s向右匀速运动的小车顶部,由于某种原因,小车突然停止.(g=10m/s^2)问:(1)小车停止瞬间,小球怎样运动(2)小车停止瞬间,绳的拉力F1](/uploads/image/z/12419564-68-4.jpg?t=%E4%B8%80%E4%B8%AA%E5%B0%8F%E7%90%83A%E7%94%A8l%3D0.8m%E7%9A%84%E8%BD%BB%E8%B4%A8%E4%B8%8D%E5%8F%AF%E4%BC%B8%E9%95%BF%E7%9A%84%E7%BB%86%E7%BB%B3%E6%82%AC%E4%BA%8E%E4%BB%A5%E9%80%9F%E5%BA%A6v%3D4m%2Fs%E5%90%91%E5%8F%B3%E5%8C%80%E9%80%9F%E8%BF%90%E5%8A%A8%E7%9A%84%E5%B0%8F%E8%BD%A6%E9%A1%B6%E9%83%A8%2C%E7%94%B1%E4%BA%8E%E6%9F%90%E7%A7%8D%E5%8E%9F%E5%9B%A0%2C%E5%B0%8F%E8%BD%A6%E7%AA%81%E7%84%B6%E5%81%9C%E6%AD%A2.%EF%BC%88g%3D10m%2Fs%5E2%29%E9%97%AE%EF%BC%9A%EF%BC%881%EF%BC%89%E5%B0%8F%E8%BD%A6%E5%81%9C%E6%AD%A2%E7%9E%AC%E9%97%B4%2C%E5%B0%8F%E7%90%83%E6%80%8E%E6%A0%B7%E8%BF%90%E5%8A%A8%EF%BC%882%EF%BC%89%E5%B0%8F%E8%BD%A6%E5%81%9C%E6%AD%A2%E7%9E%AC%E9%97%B4%2C%E7%BB%B3%E7%9A%84%E6%8B%89%E5%8A%9BF1)
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