高台滑雪以其惊险刺激而闻名,运动员在空中的飞跃姿势具有很强的观赏性。某滑雪轨道的完整结构可以简化成如图所示的示意图。其中AB段是助滑雪道,倾角α=30轻史席序搞最氧错径°,BC段是水平起跳台,CD段是着陆雪道, AB段与BC段圆滑相连,DE段是一小段圆弧(其长度可忽略),在D、E两点分别与CD、EF相切,EF是减速雪
试题**:(1)J(2)s=18.7客亮源己胜效5m(3)m
高台滑雪以其惊险刺激而闻名,运动员等杨权垂包在空中的飞跃姿势具有很强的观赏性。某滑雪轨道的完来自整结构可以简化成如图所示的示意图。其中AB段是助滑雪道,倾角 α=30°,BC段是水平起跳台,CD段是着陆雪道,AB段与BC段圆滑相连,DE段是一小段圆弧(其长度可360问答忽略),在D、E两点分别与CD、EF相切,E沙袁不境F是减速
****************************************:(1)10m/s (2)s="18.75"m (3)20m/s
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