[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fa8xLiGg8Asj0J9jnJbdvovyDz_4QAbg7MYRnJa7UTTc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-20 09:43:51",73493389,[8,9,10,11],"对地心的角动量守恒,动能不守恒","动量不守恒,动能守恒","动量守恒,动能不守恒","对地心的角动量不守恒,动能守恒",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},37,"dc7ab8020eacfd8044b0da4fe5423491","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1bf5bb5055fb1f2c1423a0edea7e89ba.png","大学物理","exam_93636900","智能制造22级大学物理期中测试","人造地球卫星,绕地球作椭圆轨道运动,地球在椭圆的一个焦点上,则卫星的",[21,32,41,44,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],73493387,[25,26,27,28],"无法判断.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fab530dec042e26d5e799e6ac7ce42ddc.jpg\">","处处相等.","左边大于右边","右边大于左边","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(m&lt;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\u002F319a33aa51780fe9dcfd823b133e6b90.png\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],73493388,[36,37,38,39],"(1). (2)、(3)都是正确的","(2)、(3)是正确的","( 1)、(2)是正确的","只有(2)是正确的","关于力矩有以下几种说法:(1)对某个定轴而言,内力矩不会改变刚体的角动量.(2)作用力和反作用力对同- -轴的 力矩之和必为零.( 3)质量相等,形状和大小不同的两个刚体,在相同力矩的作用下,它们的角加速度一定相等.在上述说法中",{"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},[],73493390,[48,49,50,51],"a+ g","2 (a +g)","2 a","2 a+ g","在升降机天花板上拴有轻绳,其下端系一重物,当升降机以加速度a上升时,绳中的张力正好等于绳子所能承受的最大张力的一半,问升降机以多大加速度上升时,绳子刚好被拉断?\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F008cf4da6e4b00722e8637ad66d8b51c.jpg\">",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],73493391,[57,58,59,60],"它受热膨胀或遇冷收缩时,角速度不变","它受热时角速度变小,遇冷时角速度变大","它受热时角速度变大,遇冷时角速度变小","它受热或遇冷时,角速度均变大","一个物体正在绕固定光滑轴自由转动",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],73493392,[66,67,68,69],"0","mV","- 2mv","2mv","质量为m的小球,沿水平方向以速率v与固定的竖直壁作弹性碰撞,设指向壁内的方向为正方向,则由于此碰撞,小球的动量增量为",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],73493393,[75,76,77,78],"仍和原来一样 远","条件不足 ,不能判定","比原来更远","比原来更近","一炮弹由于特殊原因在水平飞行过程中,突然炸裂成两块,其中一块作自由下落,则另一块着地点(飞行过程中阻力不计)",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],73493394,[84,85,86,87],"大于2&beta;1","小于&beta;1","等于2&beta;1","大于&beta;1,小于2&beta;1","将 细绳绕在一个具有水平光滑轴的飞轮边缘上,如果在绳端挂一质量为m的重物时,飞轮的角加速度为&beta;1.如果以拉力2 mg代替重物拉绳时,飞轮的角 加速度将",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],73493395,[93,94,95,96],"弹性力作的功相等,重力作的功不相等","殚性力作的功不相等,重力作的功相等","弹性力作的功相等,重力作的功也相等","弹性力作的功不相等,重力作的功也不相等","一物体挂在一弹簧下面,平衡位置在0点,现用手向下拉物体,第一次把物体由0点拉到M点,第二次由0点拉到N点,再由N点送回M点则在这两个过程中\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F81ebd282a9cf6107775a7b4e3416ea21.jpg\">",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],73493396,[102,103,104,105],"1:1.:1","3 :2:1","1 :2:3","1 :4 :9","作直线运动的甲、乙、丙三物体,质量之比是1 :2 :3.若它们的动能相等,并且作用于每一个物体上的制动力的大小都相同,方向与各自的速度方向相反,则它们制动距高之比是"]