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题目:在掷铅球的运动中,铅球出手时距地面的高度为 h,若出手时的速度为 v_0,求 v_(?)与水平方向的夹角α为何值时,水平射程最远?其值为若干?解:如附图所示建立坐标,由题意得方程:
Title: In shot throwing, the shot height is h from the ground when the shot is shot, and v_0 when the shot is shot. What is the angle α between the v_(?) and the horizontal direction? What is the horizontal range? For a number of solutions: Set up the coordinates as shown in the figure.