[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ftzRiI5gUunmXoWCq7qy3FivAELMfCm80VAOFtBgppIU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-28 23:00:57",87620500,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F51781442859fb7cdb6c8a8b85c9a7ebb.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F819131642493a6d4901ea5da8da371bc.jpg\">","16 N","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9320b9c5811fa6808a9ec5e3128c579c.jpg\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"965b4301b3a8c2b1b9a08f64d1934268","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2962436ef1a2e42ea694fe3c934d043c.jpg","大学物理(I) - 力学和热学（4期）","work_26684550","2-2 牛顿运动定律2","一质量为2 kg的质点作半径为R=8.0m的圆周运动,其路程为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdd4212abece8f548acd1d36f9e330bab.jpg\">,则质点在t=2s时所受到的合力的大小为[ ]",[21,32,41,50,59,68,77,86,95,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],87620492,[25,26,27,28],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0394b5805cc54f1fbfbb881e355151df.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1d4245c01485093d90fb31c809704deb.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8378dd04dd99704116f477df2f9bc551.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F013515322c68bd724ed81526173d8aeb.jpg\">","如图所示,悬挂的轻弹簧下端挂着质量为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee4e71e1fc5bb1e7bdfeaf16e6720126.jpg\">的两个物体,开始时处于静止状态.现在突然把\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F189a0db3c73c4384c5372a5dcfe19fe3.jpg\">间的轻绳剪断,在绳断瞬间,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71a1011b9721cc6b60f0c112483092e5.jpg\">加速度的大小为[ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Facaa664f4a397816344cf1139847e0e3.jpg\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],87620493,[36,37,38,39],"100 N","20 N","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6c5748ffc958df96f8132b7455327ff9.jpg\">","8 N","已知一质量为10 kg的质点从静止开始作直线运动,其加速度为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb77649447851efa7d3a07a0208ae61e2.jpg\">,当其速度为14 m\u002Fs时,所受合力的大小为[ ]",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],87620494,[45,46,47,48],"作用力和反作用力总是方向相反的,所以当物体平放在桌子时,物体受到的重力和桌子对物体的支持力就是一对作用力和反作用力","物体做匀速率运动时说明物体所受合力为零","当两个物体有相对运动趋势时必然会产生静摩擦力","物体在失重时其重量就会减轻","下列说法正确的是[ ]",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],87620495,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe35c13b953051b829a465722212e3208.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fedb61bfc7cec8f2a85225e5bb3f8ee4b.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F94b5e199b34b6fa5e842aaeedb7fbdb4.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdeec6e0221efa637a4e5552879978650.jpg\">","一质量为2 kg的物体受到恒力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c8d23d0b33291c7eb2773f1eaae7e08.jpg\">的作用,在水平面内运动.在t=0时,物体位于x=0, y=2 (SI),速度为0,则物体的运动方程为[ ]",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],87620496,[63,64,65,66],"向上作加速运动","在重力作用下向上作减速运动","向上作匀速运动","立即处于静止状态","如图所示,手提一根下端系着重物的轻弹簧,竖直向上作匀加速运动,当手突然停止运动的瞬间,物体将[ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa75ae6dd8d12f21117e5472b27361e07.jpg\">",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],87620497,[72,73,74,75],"它将受到重力、绳子的拉力和离心力的作用","绳子的拉力可能为零","绳子可能处于受力平衡状态","它将受到重力、绳子的拉力和向心力的作用","用细绳系一小球,使之在竖直平面内圆周运动,当小球运动到最高点时[ ]",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],87620498,[81,82,83,84],"0.707","1.414","0.835","0.293","如图所示,两个木块通过轻质定滑轮和轻绳连在一起,物块A的质量是8 kg,斜面的倾角为45°,物块B 的质量是4 kg,物块A以匀速滑下斜面,则斜面与A之间的滑动摩擦系数是[ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe82cf3d8e486981ea3899a212e533ded.jpg\">",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],87620499,[90,91,92,93],"无法判断斜面是否运动","斜面会保持静止","斜面会向右运动","斜面会向左运动","如图所示,斜面与地面之间无摩擦,现将一块砖轻轻放在原来静止的斜面上,砖不往下滑动,则 [ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F66a5d4cee86d0957f7d861d2f2cea1dc.jpg\">",{"answer":96,"createTime":5,"id":6,"options":97,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],87620501,[102,103,104,105],"物体的加速度越大,惯性越小","在相同的合外力作用下,物体的速度越大,惯性越小","物体的速度越大,惯性越大","在相同的合外力作用下,物体的加速度越大,惯性越小","关于质点的下列叙述中正确的是[ ]"]