如图所示在竖直平面内有一固定的半圆环abc其中ab是它的水平直径c为环上的最低点环半径为r.一个小球从a点以速度v0水平抛出不计空气 Template




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tomski如图所示在竖直平面内有一固定的半圆环abc其中ab是它的水平直径c为环上的最低点环半径为r.一个小球从a点以速度v0水平抛出不计空气 coloring