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近年来,有关“社会热点”的试题经常在高考试卷中出现。这类试题一般具有“高起点、低落点”的特点,有利于考查考生的综合素质。这也将是2008年高考物理的热点,供考生复习时参考。热点一、申办奥运例1(2007年全国高考)甲乙两运动员在训练交接棒的过程中发现:甲经短距离加速后能保持9m/s的速度跑完全程;乙从起跑后到接棒前的运动是匀加速的。为了确定乙起跑的时机,需在接力区前适当的位置设置标记。在某次练习中,甲在接力区前S0=13.5m处作了标记,并以v=9m/s的速度跑到此标记时向乙发出起跑口
In recent years, questions about “social hot spots” have often appeared in the high test papers. Such questions generally have the characteristics of “high starting point, low spot ”, which is conducive to the examination of the overall quality of candidates. This will also be a hot spot for the 2008 college entrance examination physics for reference when reviewing candidates. Hotspot I. Applying for the Olympics Example 1 (National College Entrance Examination in 2007) During the training of the transfer batons, the two athletes found that: A can maintain a speed of 9m/s after completing a short-distance acceleration; B is from start to finish The movement is evenly accelerated. In order to determine the timing of the start of B, it is necessary to set a mark in the appropriate place in front of the relay zone. In one exercise, A was marked at the front of the relay zone S0 = 13.5m, and started running at the speed of v=9m/s.