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在《2014年普通高等学校招生全国统一考试理科综合能力测试》试卷中,第24题为一道生活实际相关的问题,原题如下:公路上行驶的两汽车之间保持一定的安全距离。当前车突然停止时,后车司机可以采取刹车措施,使汽车在安全距离内停下而不会与前车相碰。通常情况下,人的反应时间和汽车系统的反应时间之和为1s。当汽车在晴天干燥沥青路面上以108k★的速度匀速行驶时,安全距离为120m,设雨天时汽车轮胎与沥青路面间的动摩擦因数为晴天时的0.4倍,
In the 2014 General College Entrance Examination National Comprehensive Examination Science Comprehensive Ability Test papers, the twenty-fourth title is a practical life-related issues, the original title is as follows: Between the two vehicles on the road to maintain a certain safety distance. When the current car suddenly stops, the driver behind the car can take a brake to stop the car within a safe distance without colliding with the car in front. In general, the sum of the reaction time of a person and the reaction time of a car system is 1s. When the car on a sunny dry asphalt pavement to 108k ★ uniform speed, the safe distance of 120m, set the car when the rain and the asphalt pavement dynamic friction factor 0.4 times the sunny days,