[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fscrId1WpRirKvZd4I95MNGmnMXQhycYsUiPftXBB6DU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-04-14 11:30:53",182939812,[8,9,10,11],"不变","变小","变大","如何变化无法判断",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},16,"9bf2540c4c6550fadf15980eabff2925","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbd4ceb085e7fb614315a0999b89440b7.jpg","《大学物理》课程--NEPU","work_42583854","第三章选择练习","一轻绳绕在有水平轴的定滑轮上,滑轮的转动惯量为J,绳下端挂一物体.物体所受重力为P,滑轮的角加速度为α.若将物体去掉而以与P相等的力直接向下拉绳子,滑轮的角加速度α将",[21,32,41,50,59,68,77,86,95,104],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],182939803,[25,26,27,28],"JA>JB","JA<JB","JA=JB","JA、JB那个大不能确定","两个均质圆盘A和B的密度分别为ρA和ρB,若ρA>ρB,但两圆盘的质量和厚度相同,如两盘对通过盘心垂直于盘面的轴的转动惯量各为JA和JB,则","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],182939804,[36,37,38,39],"β1=β2","β1>β2","β1<β2","开始时β1=β2,以后β1<β2","如图所示,A、B为两个相同的绕着轻绳的定滑轮,A滑轮挂一质量为M的物体,B滑轮受拉力F,而且F=Mg,设A、B两滑轮的角加速度分别为β1和β2,不计滑轮轴的摩擦,则有:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0bb4905636ffb8badd4dc45ab3153657.png\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],182939805,[45,46,47,48],"处处相等","左边大于右边","右边大于左边","哪边大无法判断","一轻绳跨过一具有水平光滑轴,质量为M的定滑轮,绳的两端分别悬有质量为m1和m2的物体(m1<m2),如图所示,绳与轮之间无相对滑动.若某时刻滑轮沿逆时针方向转动,则绳中的张力:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03307bfcf6ba2dff9dff19f3a847e837.png\">",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],182939806,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F64e2396b14f952d9d4ba2d22a4d2b56e.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbb4a2a219bac3b32eda529bd1506bbb6.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa26476feaf3c941f43bf0700b6bdd319.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9e4171c638217bbac1270f7dd3424093.webp\">","花样滑冰运动员绕通过自身的竖直轴转动,开始时两臂伸开,转动惯量为J0,角速度为ω0,然后她将两臂收回,使转动惯量减少为J0\u002F3,此时她转动的角速度变为",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],182939807,[63,64,65,66],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F517fef08c79910b1f4c93598760f24fd.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff26b715edeeba2ec2daeb6cd60f55db0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F851141c8ed38f008322d58be97f60514.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffd2347067ef5e2cb637ccac6b4942bd8.png\">","如图所示,一静止的均匀细棒,长为L、质量为M,可绕通过棒的端点且垂直于棒长的光滑固定轴O在水平面内转动,转动惯量为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdf4ea112d4aebd3aa5cd4c258c941d6d.png\">.一质量为m、速率为v的子弹在水平面内沿与棒垂直的方向射出并穿出棒的自由端,设穿过棒后子弹的速率为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Feee501e0280e15af66e99cc40e881d97.png\">,则此时棒的角速度应为:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9e27bacbc46700e98e234290b3327f99.png\">",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],182939808,[72,73,74,75],"必然不会转动","转速必然不变","转速必然改变","转速可能不变,也可能改变","几个力同时作用在一个具有光滑固定转轴的刚体上,如果这几个力的矢量和为零,则此刚体",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],182939809,[81,82,83,84],"必然增大","必然减少","不会改变","如何变化,不能确定","一圆盘绕过盘心且与盘面垂直的光滑固定轴O以角速度ω按图示方向转动.若如图所示的情况那样,将两个大小相等方向相反但不在同一条直线的力F沿盘面同时作用到圆盘上,则圆盘的角速度ω:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F985b536bc70200cd8ae28c9b29c5dfae.png\">",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],182939810,[90,91,92,93],"角速度从小到大,角加速度从大到小","角速度从小到大,角加速度从小到大","角速度从大到小,角加速度从大到小","角速度从大到小,角加速度从小到大","均匀细棒OA可绕通过其一端O而与棒垂直的水平固定光滑轴转动,如图所示.今使棒从水平位置由静止开始自由下落,在棒摆动到竖直位置的过程中,下述说法哪一种是正确的:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3e4b2d1d6500e28e8355e4fbd9a5fb12.png\">",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],182939811,[99,100,101,102],"只取决于刚体的质量,与质量的空间分布和轴的位置无关","取决于刚体的质量和质量的空间分布,与轴的位置无关","取决于刚体的质量、质量的空间分布和轴的位置","只取决于转轴的位置,与刚体的质量和质量的空间分布无关","关于刚体对轴的转动惯量,下列说法中正确的是",{"answer":105,"createTime":5,"id":6,"options":106,"question":19,"source":30,"type":31},[],[8,9,10,11]]