图示一均质圆盘以匀角速度w绕其边缘上的O轴转动，已知圆盘的质量为m，半径为R，则它对O轴的动量矩GO大小为<br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/6ce382e4e758cda2cb06501b7857e9e3.jpg"/><br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/d154973c1545f31d9e40763e04673de0.jpg"/><br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/c717b1603b6ce9acbb1474907cd8e974.jpg"/><br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/000ba946d0816773c17e419ec69d6831.jpg"/><br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/e6b936f28a6b91737dae88f9b50acaa8.jpg"/>