一般研究平抛运动,都是将它分解成水平方向的匀速直线运动和竖直方向的自由落体运动.可是,在斜面问题当中,这种方法并不好用.笔者通过教学实践,发现一种另类分解方法,可以很简便地解决斜面抛体问题,具体方法为将物体的运动分解为沿斜面方向和垂直于斜面方向的运动.也就是说,把初速度v The general study of flat throwing movements is to decompose it into a horizontal uniform linear motion and a vertical free fall motion. However, in the slope problem, this method is not easy to use. The author found a kind of teaching practice. The alternative decomposition method can easily solve the problem of slope casting. The specific method is to decompose the movement of the object into the direction along the direction of the slope and perpendicular to the direction of the slope. That is to say, the initial velocity v