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【单选题】
如图所示曲柄连杆机构带动摇杆O1C绕轴O1摆动。在连杆AB上装有两个滑块，滑块B在水平槽内滑动，而滑块D则在摇杆O 1C的槽内滑动。已知：曲柄长OA=50 mm，绕轴O转动的匀角速度ω=10rad/s 。在图示位置时，曲柄与水平线间成90°角，∠OAB= 60°，摇杆与水平线间成 60°角；距离O1 D=70 mm。求摇杆的角速度和角加速度。 【图片】A.
3.093rad/s 39.05 rad/s2
B.
6.186rad/s 78.1 rad/s2
C.
12.366rad/s 78.1 rad/s2
D.
6.186rad/s 39.05 rad/s2
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