一长为L的匀质细杆,可绕通过中心O的固定水平转轴在铅直平面内自由转动（转动惯量为M(L2)/12),开始时杆水平静止,一

一长为L的匀质细杆,可绕通过中心O的固定水平转轴在铅直平面内自由转动（转动惯量为M(L2)/12),开始时杆水平静止,一质量与杆相同的昆虫以速度V垂直落到杆上L/4处,昆虫下落后立即向杆的端点爬去,若要使杆匀角速度转动,试求昆虫沿杆爬行的速率?

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