22.如图15所示一光�的半径为r的半圆形轨道ab放在水平面上一个质量为m的小球以某一速度冲上轨道小球恰好能过最高点b然后从b点飞出 Template




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tomski22.如图15所示一光�的半径为r的半圆形轨道ab放在水平面上一个质量为m的小球以某一速度冲上轨道小球恰好能过最高点b然后从b点飞出 coloring