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2012年江苏高考数学卷的第17题是一个二次函数抛物线的问题,能否用高中物理方法来解答呢?首先我们来看一下原题.原题.如图1,建立平面直角坐标系xOy,x轴在地平面上,y轴垂直于地平面,单位长度为1km.某炮位于坐标原点.已知炮弹发射后的轨迹在方程
2012 Jiangsu college entrance examination math volume of the seventeenth question is a quadratic function parabola problem, can use high school physics method to answer it? First of all, we have a look at the original topic .In Figure 1, the establishment of rectangular Cartesian coordinate system xOy , the x-axis is on the ground plane, the y-axis is perpendicular to the ground plane, and the unit length is 1km. A gun is located at the origin of the coordinates.