[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fqfX6zthK5sYCyK6cDtVOkKHl3GDYYABHmMw3C6Nt-x4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-03-17 23:13:10",134462071,[8,9,10,11],"力越大,功率越大","距离越长,功率越大","做功越多,功率越大","做功越快,功率越大",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},127,"d666eda9b10351452961f16016433858","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc4dbade751403f19ce5fe4056a50a610.jpg","大学物理I(1)","5e230b180aad4693a9372b29880034ae","《功和能》(章)过关测试","关于力、距离、功与功率的关系,下列说法正确的是( )",[21,32,41,44,54,63,72,81,90,100],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],134462069,[25,26,27,28],"牛顿","千克","瓦特","焦耳","在国际单位制中,功的单位是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],134462070,[36,37,38,39],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4cdaeef6a05c648f198351b5acfdc8c9.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8427a56ce20f6cc866750c5b24da336.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5ceb88042e4facd0088ce7b860f42901.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff5791f2922851c9d448406e47cfe3a39.jpg\">","如图所示的四幅图是小新提包回家的情景,小新提包的力不做功的是( )",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":46,"id":47,"options":48,"question":53,"source":30,"type":31},[],"2024-03-17 23:13:11",134462072,[49,50,51,52],"滑动摩擦力总是做负功","滑动摩擦力可能做负功,也可能做正功","静摩擦力对物体一定做负功","静摩擦力对物体总是做正功","关于摩擦力对物体做功,以下说法中正确的是( )",{"answer":55,"createTime":46,"id":56,"options":57,"question":62,"source":30,"type":31},[],134462073,[58,59,60,61],"摩擦力做的功为fs","力F做的功为Fscosθ","力F做的功为Fssinθ","重力做的功为mgs","如图所示,一个物体放在水平面上,在跟竖直方向成θ角的斜向下的推力F的作用下沿平面移动了距离s,若物体的质量为m,物体与地面之间的摩擦力大小为f,则在此过程中( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc013db74c4871caaa9c86f0e1c5e47ee.jpg\">",{"answer":64,"createTime":46,"id":65,"options":66,"question":71,"source":30,"type":31},[],134462074,[67,68,69,70],"mgh","mah","m(g+a)h","m(g-a)h","起重机竖直吊起质量为m的重物,上升的加速度是a,上升的高度是h,则起重机对货物所做的功是( )",{"answer":73,"createTime":46,"id":74,"options":75,"question":80,"source":30,"type":31},[],134462075,[76,77,78,79],"mgR(1-cosa)","mgR(1-sina)","mgR(1+sina)","mgR(1+cosa)","质量为m的小球系于长度为R的细绳的末端, 细绳的另一端固定在点A, 将小球悬挂在空间.现小球在水平推力F的作用下, 缓慢地从竖直位置移到细绳与竖直方向成a角的位置,如图所示.则水平推力F所作的功为( )(不考虑空气阻力).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4297e8271abcd7e5589a64b4c5193f39.png\">",{"answer":82,"createTime":46,"id":83,"options":84,"question":89,"source":30,"type":31},[],134462076,[85,86,87,88],"弹性力所作的总功为1.0J,外力做的总功为1.0J","弹性力所作的总功为-1.0J,外力做的总功为1.0J","弹性力所作的总功为1.0J,外力做的总功为-1.0J","弹性力所作的总功为-1.0J,外力做的总功为-1.0J","已知弹簧的劲度系数k = 200 N×m-1 , 若忽略弹簧的质量和摩擦力,将弹簧压缩10 cm , 则弹性力所作的功和外力所作的功分别为( )",{"answer":91,"createTime":92,"id":93,"options":94,"question":99,"source":30,"type":31},[],"2024-03-17 23:13:12",134462077,[95,96,97,98],"540J","290J","580J","270J","某质点沿x轴作直线运动,受力 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbe1bf20e9a7c11021ec5f5599ef0829c.jpg\">(N),当质点从x0=0移动到x=10m处的过程中,该力作功为( )",{"answer":101,"createTime":92,"id":102,"options":103,"question":108,"source":30,"type":31},[],134462078,[104,105,106,107],"弹性力作的功相等,重力作的功不相等","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","一物体挂在弹簧下面,平衡位置在O点.现用手向下拉物体,第一次把物体由O点拉到M点,第二次把物体由O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\u002F602a2fa6c250479ff3017e77e5655cd8.jpg\">"]