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利用图象研究物理问题是物理学的一种重要方法,匀变速直线运动中的 v-t 图象是中学物理中的一个重要图象,如果能灵活应用,一定会收到事半功倍的效果.现从三个方面例析如下:一、在匀变速(或分段匀变速)运动中求速度或时间例1 汽车从甲地由静止起动,做匀加速直线运动,历经7 min,然后改做匀减速直线运动,再经5 min 到达乙地停止.已知甲、乙两地距离为1.2 km,求汽车运动过程中的最大速
The use of images to study physics is an important method of physics. The vt image in uniform linear motion is an important image in middle school physics. If it can be applied flexibly, it will surely receive a multiplier effect. Now it is from three. Examples are as follows: First, in the uniform speed (or uniform speed) movement speed or time Example 1 The car from the ground to start by static, do uniform acceleration linear motion, after 7 min, and then change to make a uniform deceleration line Exercise, and then stop at B after 5 min. Know that the distance between A and B is 1.2 km. Find the maximum speed during the sports car.