2022年我国成功举办了第24届“冬奥会”,冬奥会让冰雪运动走向大众.图1为滑雪大跳台的简化模型:
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段和
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段是长度均为
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的倾斜滑道,
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段为圆弧滑道,与
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平滑连接,
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段为结束区.运动员从助滑区
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的台端A点出发,在助滑道
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上获得高速度,至跳台区
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依靠惯性配合身体动作跃向空中,从跳台区的末端C点水平飞出后,身体以抛物线轨迹在空中飞行.已知跳台高
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是
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, 某位运动员的一次动作中,在离开跳台末端C点后水平前进了
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时,高度恰好下降了
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(忽略运动过程中所受的空气阻力),为方便研究,我们建立了如图2所示的平面直角坐标系.
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