[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdw5LBfF5h9WPXk0Of6hF4xlgYnxm5xfe2TVgOUqClTg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-11-29 21:46:33",168136021,[8,9,10,11],"30kN","40kN","27.7kN","0",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},22,"a966d58e42dc32214d19d61ea02f207a","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbd0ed37252c82ddda29abe4e9ba5a79e.png","理论力学","41b5ed6cd2134731af248e3687a3422b","","4.重P=80kN的物体自由地放在倾角为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F020bba87887282fbe634755cef5c9a92.webp\">的斜面上,若物体与斜面间的静摩擦因数\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F963954be8fb682179761151ca993a41f.webp\">,动摩擦因数f=0.4,则作用在物体上的摩擦力的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F15238afee389feef03ee189cf840fbdf.webp\">",[21,32,41,48,51,58,67,76,84,91],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],168136018,[25,26,27,28],"向上运动","向下运动","静止不动","不能确定是否运动","1.已知P=100N,F=80N,静摩擦因数fs=0.2,物块将( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F38bab6d07b1cf6612066c7a2002887b5.webp\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],168136019,[36,37,38,39],"20kN","16kN","15kN","12kN","2.物A重100kN,物B重25kN,A物与地面的静摩擦因数为0.2,滑轮处摩擦不计.则物体A与地面间的摩擦力为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F98b4e1447f19645ddaf7bcf2f45f9fb4.webp\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":47,"source":30,"type":31},[],168136020,[38,45,46,39],"3kN","10kN","3.若F=50kN,P=10kN,墙与物体间的静摩擦因数fs=0.3,则摩擦力为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F75348fd39e3bdb298d9aa8882fa7c9bb.webp\">",{"answer":49,"createTime":5,"id":6,"options":50,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":52,"createTime":5,"id":53,"options":54,"question":57,"source":30,"type":31},[],168136022,[55,36,56,11],"25kN","17.3kN","5.已知P=60kN,F=20kN,物体与地面间的静摩擦因数fs=0.5,动摩擦因数f=0.4,则物体所受的摩擦力的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F30a4d03b94d077ee7a3d00a4a103a7c1.webp\">",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":30,"type":31},[],168136023,[62,63,64,65],"不动","滑动","处于临界状态","滑动与否无法确定","1.物块重5kN,与水平面间的摩擦角为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F524db090c96df7c31b5893024c3258e5.webp\">,今用与铅垂线成\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F85b368b8646f8e3169fff858c4972352.webp\">角的力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9caf28ab12eb2750ec5a622237112335.webp\">推动物块,若F=5kN,则物块将( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5c82bdf89eaec5953485dd8a0523d0d1.webp\">",{"answer":68,"createTime":69,"id":70,"options":71,"question":75,"source":30,"type":31},[],"2024-11-29 21:46:34",168136024,[72,73,64,74],"能","不能","F与P的值比较小时能保持静止,否则不能","2.物块重P,放在粗糙的水平面上,其摩擦角\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6548648eca8a9474f83cf22e4324e0e3.webp\">,若力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9caf28ab12eb2750ec5a622237112335.webp\">作用于摩擦角之外,并已知\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc3eae292b00d7db3a211f435f2612ce9.webp\">,F=P,物体是否能保持静止( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb2fd0a280e29f3c36ec6535793603c05.webp\">",{"answer":77,"createTime":69,"id":78,"options":79,"question":83,"source":30,"type":31},[],168136025,[27,80,81,82],"减速下滑","加速下滑","无法确定","3.一重P的物体置于倾角为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2324b00e9076b6d056c6fa8da4912d67.webp\">的斜面上,若摩擦因数为fs,且\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7c2656dbecde74572709133c4409feba.webp\">,则物体( ),若增加物体重量,则物体( );若减轻物体重量,则物体( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f91c93b9d9e45292e49d74c6bd7a386.webp\">",{"answer":85,"createTime":69,"id":86,"options":87,"question":90,"source":30,"type":31},[],168136026,[38,88,89,11],"12 kN","17.3 kN","4.已知力P=40kN,F=20kN,物体与地面间的摩擦因数fs=0.5,动摩擦因数f=0.4,则物体所受的摩擦力的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffc20aeb808f465e21dec09e68e49e2ec.webp\">",{"answer":92,"createTime":69,"id":93,"options":94,"question":99,"source":30,"type":31},[],168136027,[95,96,97,98],"Ff=fsP,Mf=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Feeecc09b81733461e1be4667a9a18ebc.webp\">","Ff=F,Mf=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Feeecc09b81733461e1be4667a9a18ebc.webp\">","Ff=fP,Mf=FR","Ff=F,Mf=FR","1.重P半径为R的均质圆轮受力F作用,静止于水平地面上,若静滑动摩擦因数为fs,动滑动摩擦因数为f.滚动摩阻系数为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3965437ad3171db6f4b396875495d124.webp\">,则圆轮受到的摩擦力Ff和滚阻力偶Mf为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff890c06ebb77e517c70d9f337e731c9a.webp\">"]