[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fMkm7B0AoX_VdPHqwQtERHMjE3tzPG74Ep-Wueb5Ywzs":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":17,"type":18},[],"2026-04-03 14:17:35",333928900,[],{"courseId":9,"courseImg":10,"courseName":11},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","练习册,第16页,第一题 Choose the answer",[14,19,28,33,43],{"answer":15,"createTime":5,"id":6,"options":16,"question":12,"source":17,"type":18},[],[],"v1",2,{"answer":20,"createTime":21,"id":22,"options":23,"question":26,"source":17,"type":27},[],"2026-05-19 10:21:09",377370375,[24,25],"正确","错误","刚体在定轴转动中,当对轴的合外力距为零时,刚体对轴的角动量保持不变.()",3,{"answer":29,"createTime":21,"id":30,"options":31,"question":32,"source":17,"type":27},[],377370377,[24,25],"当对轴的合外力距为零时,转动惯量越大,角速度也越大.()",{"answer":34,"createTime":21,"id":35,"options":36,"question":41,"source":17,"type":42},[],377370379,[37,38,39,40],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F41f81ec9726031a996b0d6a3c13dc61b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F157771a890532cd9bca36c9b0f8dc431.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F95a41362731536f4de368c986188dcca.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd7d14a2851561ec4b9d98a38083be979.png\">","长为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd10d8300a237cf92e88475e64d313ccf.png\">的竖直轻杆,两端各固定质量分别为m(下端)和2m(上端)的小球,杆可绕水平光滑固定轴O在竖直面内转动,转轴O距上端和下端分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee22062c2db017e0f3fc67470f220723.png\">和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3e705becc013a8682922345a404b75a.png\">.轻杆原来静止在竖直位置.今有一质量为m的小球,以水平速度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffdd2b8019c8f8626c885da8095e639d2.png\">与杆下端小球m作对心碰撞,碰后以\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe48ae79823bed523f77b48d8940f1347.png\">的速度返回,则碰后轻杆所获得的角速度是多少?()",0,{"answer":44,"createTime":21,"id":45,"options":46,"question":51,"source":17,"type":42},[],377370381,[47,48,49,50],"100m\u002Fs","108m\u002Fs","120m\u002Fs","98m\u002Fs","一空间探测器质量为6090Kg,正相对于太阳以105m\u002Fs的速率向木星运动.当它的火箭发动机相对于它以253m\u002Fs的速率向后喷出80Kg废气后,它对太阳的速率变为多少?()"]