高中教材曾对斜抛物体的最大射程进行过详细的研究,其结论是:当物体以一定的初速度 v_0作斜抛运动时,投射角为45°时,其射程最大.其实,该结论只适用于“物体的抛出点与落地点位于同一水平面”的情况.而现实生活中的许多斜抛运动物体的抛出点与落地点并不在同一平面上.如推铅球、洒水车向地面 High school textbooks have conducted detailed studies on the maximum range of oblique objects. The conclusion is that when an object moves obliquely at a certain initial velocity v_0, the projection angle is 45°, and its range is the largest. In fact, this conclusion is only It is applicable to the case where the throwing point of an object is located on the same level as the landing point. However, the throwing point and landing point of many obliquely moving objects in real life are not on the same plane. For example, the shot put, the watering car ground