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【简答题】
如图所示,曲柄0.4长50mm,以匀角速度 =10rad/s绕O轴转动,通过连杆AD和滑块B、D使摆杆O、C绕Ol轴转动。在图示位置,曲柄OA垂直于水平线OBO1,摆杆O1C与水平线成60o角,且OlD=70mm。试求此瞬时摆杆OlC的角速度及滑块D的速度。
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