高中物理必修教材中提到,在斜抛物体运动中,当抛射角θ=45°时,水平射程最大.结果,有人将这一结论用于投掷铅球等运动之中,导致错误.因为这个结论是在落地点与抛出点等高时得出的.那么,要是将物体从某一高度处斜向上抛出,落地点和抛出点不等高时(投掷铅球等就属此类情况),射程最大的条件又是什么呢?结论应该是抛射角θ<45°,且粤 It is mentioned in the physics compulsory textbook for high school that the horizontal range is the greatest when the angle of theta θ = 45 ° in the case of inclined paraboloid movement, and as a result, this conclusion is used in throwing shots and other sports, leading to errors. Is obtained when the landing point and the throw point contour, then, if the object is thrown obliquely from a certain height, landing point and throwing point is not high (such as throwing shot put, etc.) What is the maximum range of the conditions? The conclusion should be the angle of projection θ <45 °, and Guangdong