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题将小球从高 h 处以速率 v_0抛出,求其水平位移的最大值.解法1 如图1所示,将小球的斜抛运动正交分解为沿水平方向的速度为 v_0 cosθ的匀速直线运动和沿 h着竖直方向的初速度为 v_0 sinθ的竖直上抛运动,列出如下方程:
The question throws the ball from high h at the rate v_0 and finds the maximum value of its horizontal displacement. Solution 1 As shown in Fig. 1, the ball’s obliquely throwing motion is orthogonally decomposed into uniform velocity v_0 cos θ in the horizontal direction. The linear motion and the vertical upward motion with v_0 sin θ along the vertical direction of h are listed as follows: