[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fG38FeS9ANRCs8f1nXTPDUInn95CC6TAj-CYjjIoa_3I":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":27,"type":79},[],"2025-05-12 10:36:42",187253863,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},15,"0e8dfad2bc2cb3ed90603742156a4b30","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe7b1e6905a34e261fc93da0a49aa3161.png","大学物理A1","work_42343004","功 动能定理 功能关系 机械能守恒","一质点在二恒力的作用下发生位移为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9866eaea46f5508e9141a85482fe641c.png\">,动能增量为24J,已知其中一恒力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fda91da3dea35db32a95968c069bfd775.png\">,则另一恒力做功为( )J",[17,29,38,47,56,65,74,80,85,88],{"answer":18,"createTime":19,"id":20,"options":21,"question":26,"source":27,"type":28},[],"2025-05-12 10:36:41",187253853,[22,23,24,25],"在两种情况下,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0defb3e47b56748ef8500b38f0e95cbd.png\">做的功相等","在两种情况下,摩擦力对箱子做的功相等","在两种情况下,箱子获得的动能相等","在两种情况下,因摩擦而产生的热相等","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe16c33d211d5e5b96e0defdbc187f770.png\">在光滑水平地面上放置一辆小车,小车左端放置一只箱子,小车与箱子间的接触面粗糙,今用同样的水平恒力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0defb3e47b56748ef8500b38f0e95cbd.png\">拉箱子,使它由小车的左端到达右端,一次小车被固定在水平地面上,另一次小车没有固定.以地面为参照系,下列说法正确的是( )","v1",0,{"answer":30,"createTime":19,"id":31,"options":32,"question":37,"source":27,"type":28},[],187253854,[33,34,35,36],"25m\u002Fs","20m\u002Fs","10m\u002Fs","7.07m\u002Fs","一质量为4kg的物体,在光滑的水平面受到水平变力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff40054173666c254aec2bbbbf2a3e8af.png\">(式中各物理量单位均为SI制)作用,以初速v0=5m\u002Fs从原点出发,物体运动到x=10m时的速度为( )",{"answer":39,"createTime":19,"id":40,"options":41,"question":46,"source":27,"type":28},[],187253855,[42,43,44,45],"(1)(2)","(2)(3)","只有(2)","只有(3)","功的概念有以下几种说法 (1)保守力作功时,系统内相应的势能增加 (2)质点运动经一闭合路径,保守力对质点作的功为零 (3)作用力和反作用力大小相等,方向相反,所以两者作功的代数和必为零 以上论述中,哪些是正确的( )",{"answer":48,"createTime":19,"id":49,"options":50,"question":55,"source":27,"type":28},[],187253856,[51,52,53,54],"动量守恒,动能守恒","动量不守恒,机械能守恒","动量不守恒,动能守恒","动量守恒,机械能守恒","在水平光滑的桌面上横放着一个圆筒,筒底固定着一个轻质弹簧.今有一小球沿水平方向正对弹簧射入筒内(如图所示),尔后又被弹出.圆筒(包括弹簧)、小球系统在这一整个过程中 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3ea6ee7db4535b9c70588b9837f3ed1c.png\">",{"answer":57,"createTime":19,"id":58,"options":59,"question":64,"source":27,"type":28},[],187253857,[60,61,62,63],"推力不做功","推力与摩擦力做功之和为零","推力与重力做功之和为零","该重物所受力做功之和为零","将一重物匀速推上一个斜坡,下列说法正确的是( )",{"answer":66,"createTime":19,"id":67,"options":68,"question":73,"source":27,"type":28},[],187253858,[69,70,71,72],"合外力为0","合外力不作功","外力和非保守内力都不作功","外力和保守内力都不作功","对于一个物体系来说,在下列条件中,哪种情况下系统的机械能守恒?( )",{"answer":75,"createTime":19,"id":76,"options":77,"question":78,"source":27,"type":79},[],187253859,[],"一个力F作用在质量为 1.0 kg的质点上,使之沿x轴运动.已知在此力作用下质点的运动学方程为x=3t-4t2+t3 (SI).在0到4 s的时间间隔内力F对质点所作的功 ____J,动能的增量为______J",2,{"answer":81,"createTime":19,"id":82,"options":83,"question":84,"source":27,"type":79},[],187253861,[],"一个质点在力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc14e85fe750a4cf775b4aca47c5de95a.png\">作用下产生的位移\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffc6c6c724f1893ec54be2926fcb7f85b.png\">,则这个力所作的功为____J",{"answer":86,"createTime":5,"id":6,"options":87,"question":15,"source":27,"type":79},[],[],{"answer":89,"createTime":5,"id":90,"options":91,"question":92,"source":27,"type":79},[],187253865,[],"一质点受力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5a8f608accfbbca43a7a52577494e2f4.png\">作用,沿X轴正方向运动.从x=0到x=2m过程中,力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6a10f51f1d450d615e4d514d1e255c5e.png\">作功为 J.(填整数)"]