题目

如图所示，在一次“飞车过黄河”的表演中，汽车从最高点至着地点经历时间0.8s，两点间水平距离30m．求：                                                                                                                            （1）最高点与着地点的高度差；                                                                                     （2）汽车的水平速度．（g取10m/s2）                                                                                                                                                                                                                                                                                                                  答案：（1）最高点和着地点的高度差h=． （2）汽车的水平速度． 答：（1）最高点与着地点的高度差为3.2m． （2）汽车的水平速度为37.5m/s．

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