• 2022-06-03
    系统中各杆都为均质杆。已知杆OA,CD质量各为m,杆AB质量为2m,且OA=AC=CB=CD=L,杆OA以角速度w转动,则图示瞬时,OA杆动量的大小为____________________________。[img=985x1289]18034db291cca65.jpg[/img]
    A: [img=40x44]18034db29b72de4.png[/img]
    B: [img=74x26]18034db2a43b28a.png[/img]
    C: [img=65x48]18034db2ad95af7.png[/img]
    D: 0
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