[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fcpGPIhkfd7MYW-duBLh-mJaleOnBIesJDqd9aal39Tk":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-03-17 23:13:12",134462078,[8,9,10,11],"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",{"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","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\">",[21,33,42,51,61,70,79,88,97,106],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-03-17 23:13:10",134462069,[26,27,28,29],"牛顿","千克","瓦特","焦耳","在国际单位制中,功的单位是( )","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],134462070,[37,38,39,40],"\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":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],134462071,[46,47,48,49],"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","关于力、距离、功与功率的关系,下列说法正确的是( )",{"answer":52,"createTime":53,"id":54,"options":55,"question":60,"source":31,"type":32},[],"2024-03-17 23:13:11",134462072,[56,57,58,59],"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":62,"createTime":53,"id":63,"options":64,"question":69,"source":31,"type":32},[],134462073,[65,66,67,68],"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":71,"createTime":53,"id":72,"options":73,"question":78,"source":31,"type":32},[],134462074,[74,75,76,77],"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":80,"createTime":53,"id":81,"options":82,"question":87,"source":31,"type":32},[],134462075,[83,84,85,86],"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":89,"createTime":53,"id":90,"options":91,"question":96,"source":31,"type":32},[],134462076,[92,93,94,95],"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":98,"createTime":5,"id":99,"options":100,"question":105,"source":31,"type":32},[],134462077,[101,102,103,104],"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":107,"createTime":5,"id":6,"options":108,"question":19,"source":31,"type":32},[],[8,9,10,11]]