如图1所示轻杆一端固定在o点另一端固定一小球现让小球在竖直平面内做半径为r的圆�运动.小球运动到最高点时杆与小球间弹力大小为f小球在 Template




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tomski如图1所示轻杆一端固定在o点另一端固定一小球现让小球在竖直平面内做半径为r的圆�运动.小球运动到最高点时杆与小球间弹力大小为f小球在 coloring