[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fGXbF6VtvxkqCK49JDp9ytCXKC8vE6OWCQKkhLIwdhYM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-11-28 11:08:40",244159744,[8,9,10,11],"匀加速直线运动,加速度沿x轴正方向","匀加速直线运动,加速度沿x轴负方向","变加速直线运动,加速度沿x轴正方向","变加速直线运动,加速度沿x轴负方向",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},83,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_47397057","大学物理作业二(力学热学)","某质点作直线运动的运动学方程为x=3t-5t3 + 6 (SI),则该质点作[ ]",[21,32,41,50,59,68,77,86,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],244159737,[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,不可能作曲线运动","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的力作用下,不可能作圆周运动","下列四种说法中,正确的为:[ ]","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],244159738,[36,37,38,39],"物体静止或作匀速运动时才具有惯性","物体受力作变速运动时才具有惯性","物体受力作变速运动时才没有惯性","惯性是物体的一种固有属性,在任何情况下物体均有惯性","关于惯性有下面四种说法,正确的为:[ ]",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],244159739,[45,46,47,48],"钢球运动越来越慢,最后静止不动","钢球运动越来越慢,最后达到稳定的速度","钢球运动越来越快,一直无限制地增加","钢球运动越来越快,最后达到稳定的速度","在足够长的管中装有粘滞液体,放入钢球由静止开始向下运动,下列说法中正确的是:[ ]",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],244159740,[54,55,56,57],"0","P \u002F4","P","P\u002F2","一人肩扛一重量为P的米袋从高台上往下跳,当其在空中运动时,米袋作用在他肩上的力应为:[ ]",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],244159741,[63,64,65,66],"aA = 0,aB = 0","aA > 0,aB < 0","aA < 0,aB > 0","aA < 0,aB = 0","质量分别为m1 和m2 的两滑块A 和B 通过一轻弹簧水平连结后置于水平桌面上,滑块与桌面间的滑动摩擦系数均为m ,系统在水平拉力F 作用下匀速运动,如图所示.如突然撤消拉力,则刚撤消后瞬间,二者的加速度aA 和aB 分别为 [ ]\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F307aa5334d957660d6b7f6037faac6ef.png\">",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],244159742,[72,73,74,75],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa005a9b685f5a57da431404467dedd68.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6d22d16fcb0985bde9033a783dd66b1b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0e369236db80887ca70bd847c29bcf37.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2de01931d184f44f0943256370660a0c.png\">","一质量为m的物体在t = 0时下落,受到重力和正比于其速度(相对于空气)的空气阻力作用,已知相对固定在地面上的坐标系来说,其运动方程为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F22d1945d2e20fb441e5a44665d6cebc0.png\">,则相对于以垂直向上速度v0运动的另一运动坐标系(用'表示)来说,运动方程变为: [ ]",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],244159743,[81,82,83,84],"大小为g,方向向上","大小为g,方向向下","大小为g\u002F2,方向向上","大小为g\u002F2,方向向下","两个物体A和B用细线连结跨过电梯内的一个无摩擦的轻定滑轮.已知物体A的质量为物体B的质量的2倍,则当两物体相对电梯静止时,电梯的运动加速度为:[ ]",{"answer":87,"createTime":5,"id":6,"options":88,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],244159745,[93,94,95,96],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9d4d66b8027a688a8691c9ad8c7deffa.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffa783f7f62bd3531fb06b8130c7cf86f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F851a9be222d481c95cece812e62b1980.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae0e9ee242c5f8f053318bb57f9b3f99.png\">","一个圆锥摆的摆线长为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0d3a900a0e0864575ade6ed994501317.png\">,摆线与竖直方向的夹角恒为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2cd23ec3155dd262a3258e7756dcb81e.png\">,如图所示.则摆锤转动的周期为[ ]\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c67627a30d6e590879a2010fe41a820.png\">",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],244159746,[102,103,104,105],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae6dc1547839b0a78d0cde7b06b2be82.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbaeb86979780fb10932074d4449b5d30.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9f5895f890e5359f7df7c4c595f15a4a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd5dffe53024def2072b7de484e9ac87e.png\">","粒子B的质量是粒子A的质量的4倍.开始时粒子A的速度为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F19eb4757bde75c1857fab6835a5045e8.png\">,粒子B的速度为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc3bc2feff13f2cd497f9123c09415296.png\">.由于两者的相互作用,粒子A的速度为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3d217a9bb3b6bf66bc164828bfd80bfc.png\"> ,此时粒子B的速度等于[ ]"]