本刊在2007年第6期刊登了《对一道斜抛运动竞赛题解法的再探讨》一文,该文利用4种不同的方法求解斜抛运动的最大射程,读后深受启发,本文介绍第5种方法——安全抛物线法.原题:如图1所示,从距地面高h处将一小球以速率v_0抛出,抛出时速度与水平方向成θ角,求θ角为何值时,落地点距 In the 6th issue of 2007, this magazine published the article “Reconsideration of the Solution to a Skating Sports Competition Problem.” This article uses four different methods to solve the maximum range of slanting motion. It was deeply inspired after reading this article. 5 methods - safety parabola method. The original title: as shown in Figure 1, a ball from the ground at a high h thrown out at a rate of v_0, thrown when the speed and the horizontal direction θ angle, find the value of the angle θ When