[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f7lcWNpfpxNTSEJMLfGTuhEjOYE5HJ1jWCKdeGxDd5xY":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-06-13 17:07:41",200035531,[8,9,10,11],"不变","变小","变大","无法确定",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},54,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","exam_158502492","刚体力学单元测验","如图1.1所示,一根轻强绕在定滑轮上,滑轮的质量为m,绳下端挂有一物体.已知物体所爱的重力为G,滑轮的角加速度为β.现在将物体去掉,代之以与G相等的力竖直向下拉绳,滑轮的角加速度将()\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa6d412675fa27d6efdb270b20b57e514.jpg\">",[21,32,41,44,53,62,71,80,89,99],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],200035529,[25,26,27,28],"物体在恒力作用下,不可能作曲线运动","物体在变力作用下,不可能作直线运动","物体在垂直于速度方向,且大小不变的力作用下,作匀速圆周运动","物体在不垂直于速度方向力的作用下,不可能作圆周运动","下面说法正确的是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],200035530,[36,37,38,39],"自转周期变小,动能也变小","自转周期变小,动能增大","自转周期变大,动能增大","自转周期变大,动能减小","银河系中有一天体是均匀球体,其半径为R,绕其对称轴自转的周期为T,由于引力凝聚的作用,体积不断收缩,则一万年以后应有( )",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],200035532,[48,49,50,51],"转动惯量由刚体本身决定,与转速及其他因素无关","刚体绕转轴的转速越大,其转动的惯性越大","角动量和动量具有相同的单位","刚体的转动,必须有力矩的作用才能维持","以下说法正确的是()",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],200035533,[57,58,59,60],"动量守恒","机械能守恒","对转轴的角动量守恒","动量、机械能和角动量都守恒","一水平圆盘可绕通过其中心的固定竖直轴转动,盘上站着一个人.把人和圆盘取作系统,当此人在盘上随意走动时,若忽略轴的摩擦,此系统( )",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],200035534,[66,67,68,69],"刚体不受外力矩的作用","刚体所受合外力矩为零","刚体所受的合外力和合外力矩均为零","刚体的转动惯量和角速度均保持不变","刚体角动量守恒的充分而必要的条件是( )",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],200035535,[75,76,77,78],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6088a26119399ba30cb509cb5d657a8b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc9cae5f269aa8cb96d64cb2836b55873.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3de090048d73a05ec1cb2917f85ab019.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F191754c9bc1fcaef8d6f205c6a9c4e11.png\">","刚体的转动动能可表示为( )",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],200035536,[84,85,86,87],"刚体的质量","刚体的角速度","刚体转轴的位置","刚体的质量分布","刚体的转动惯量与哪个因素无关( )",{"answer":90,"createTime":91,"id":92,"options":93,"question":98,"source":30,"type":31},[],"2025-06-13 17:07:42",200035537,[94,95,96,97],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe1c5c46890c3e6b4fc97a8267da4f65e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fda00f415990a2a3de0bf2f22760e1b20.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcadde125d7810c89392552f431282a94.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F915fbf093922ab88c36020c7f4dccfd9.png\">","刚体的角动量可表示为( )",{"answer":100,"createTime":91,"id":101,"options":102,"question":107,"source":30,"type":31},[],200035538,[103,104,105,106],"角速度大的物体,受的合外力矩不一定大","有角加速度的物体,所受合外力矩不可能为零","有角加速度的物体,所受合外力一定不为零","若合外力矩为零,则刚体绕定轴转动的角动量不变","以下说法错误的是( )"]