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.T
问题描述：
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"?
答
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