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2011年普通高等学校招生全国统一考试(四川卷)理科综合第23题,题目立意新颖,着重考查学生的知识能力和科学素养,注重物理知识在生产、生活等方面的广泛应用,并有利于激发学生学习科学的兴趣.原题.随着机动车数量的增加,交通安全问题日益凸显.分析交通违法事例,将警示我们遵守交通法规,珍惜生命.一货车严重超载后的总质量为49t,以54km/h的速率匀速行驶.发现红灯时司机刹车,货车即做匀减速直线运动,加速度的大小为2.5m/s2(不超
In 2011, the General Symposium on Enrollment of Uni-verse Colleges and Universities in Sichuan (Volume 3) of Comprehensive Subjects of Science, with the novel intention of focusing on examining the students’ knowledge ability and scientific accomplishment, pays attention to the extensive application of physical knowledge in production and life and is conducive to stimulating With the increase in the number of motor vehicles, traffic safety issues have become increasingly prominent.Analyzing traffic violations, will alert us to comply with traffic laws and cherish life.A truck after a serious overload of the total mass of 49t to 54km / h speed uniform driving found that the driver lights the red brake, trucks that do uniform deceleration linear motion, acceleration of the size of 2.5m / s2 (not super