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一、轨道最高点的一个特征质点以初速度v_0、沿着跟水平成θ角的方向被抛出时(图1),利用运动分解的方法,可得出③式的几何意义为:轨道最高点跟抛出点连线的斜率(tgφ=I/L),它等于抛射角正切值(tgθ)的一半;或者从④式来说,抛射角的正切值等于二倍射高除以射程。这是斜抛最高点的普遍特征。
1. When a characteristic particle at the highest point of the orbit is thrown at the initial velocity v_0 and in the direction of the angle θ from the horizontal (Fig. 1), the geometrical meaning of the 3 formula can be obtained as follows: The slope of the line connecting the throw point (tg φ = I/L), which is equal to half the tangent of the throwing angle (tg θ ); or from Equation 4, the tangent of the throwing angle is equal to the double shot height divided by the range. This is a common feature of the highest point of oblique casting.