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Driving in your car with a constant speed of 12 m/s,you enco

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Driving in your car with a constant speed of 12 m/s,you encounter a bump in the road that has a circular cross-section.The radius of curvature of the bump is 36.4 m.At what speed must you go over the bump if people in your car are to feel "weightless"?
Driving in your car with a constant speed of 12 m/s,you enco
车内的人感觉失重的话,就是说座位没给人支持力,对于人来说,只受重力影响.mg=mv^2/r
可以得到v=根号(gr)=18.9m/s
不过还是有点疑问,最好是有张图
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