[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fwFBGUJjhNdxyqTvwZIQOBt7rD4fbzxdBx-iCr3Gg2OY":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":11,"question":15,"related":16,"source":27,"type":28},[],"2023-10-30 11:10:20",102547480,[8,9,10],"a","b","c",{"courseId":12,"courseImg":13,"courseName":14},"3bcbb8ad2b7d1d45daafcbfbd6676c78","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc56473f954fe9fdcb7f2a172dae8ef5c.jpg","理论力学-A","如图所示,一物块重为G,置于粗糙斜面上,物块上作用一力F.已知斜面与物块间的摩擦角为.物块能平衡的情况是( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1bb6554a8c1f925b0703f92b3f3cb56.png\">",[17,29,37,46,55,58,67,75,82,91],{"answer":18,"createTime":19,"id":20,"options":21,"question":26,"source":27,"type":28},[],"2023-10-30 11:10:19",102547476,[22,23,24,25],"tg f≤α","tg f>α","tg α≤f","tg α>f","若斜面倾角为α,物体与斜面间的摩擦系数为f,欲使物体能静止在斜面上,则必须满足的条件是 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7768819eb2ac03cedc79a57787c5b02.png\">","v1",0,{"answer":30,"createTime":19,"id":31,"options":32,"question":36,"source":27,"type":28},[],102547477,[33,34,35],"由小变大","由大变小","不变","已知杆OA重W,物块M重Q.杆与物块间有摩擦,而物体与地面间的摩擦略去不计.当水平力P增大而物块仍然保持平衡时,杆对物体M的正压力 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3f7e058021197a8ec13e9c80e5aecc1f.png\">",{"answer":38,"createTime":5,"id":39,"options":40,"question":45,"source":27,"type":28},[],102547478,[41,42,43,44],"20kN","16kN","15kN","12kN","物A重100KN,物B重25KN,A物与地面的摩擦系数为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\u002F96318fb706fe6a5ef67046efaeb32a12.png\">",{"answer":47,"createTime":5,"id":48,"options":49,"question":54,"source":27,"type":28},[],102547479,[50,51,52,53],"10G","8G","4G","12.5G","四本相同的书,每本重G,设书与书间的摩擦系数为0.1,书与手间的摩擦系数为0.25,欲将四本书一起提起,则两侧应加之P力应至少大于 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6a56f00a934b9933854f4f75dc32878a.png\">",{"answer":56,"createTime":5,"id":6,"options":57,"question":15,"source":27,"type":28},[],[8,9,10],{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":27,"type":28},[],102547481,[62,63,64,65],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71ed6f5829f168f9832de55e05ea99b7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F230451ea830869b8a5ed3877bd2e2fa0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd13fc0f05ff143e945fe953b4903d3f7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8d35770e164627c5f969c5389ba2164a.png\">","如图所示,若楔子两侧面与糟之间的摩擦角均为.欲使楔子被打入后不致自动滑出,则应为(a) \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb3717f6e48d06d0a7e72d0e0bb7e3b91.png\">",{"answer":68,"createTime":5,"id":69,"options":70,"question":74,"source":27,"type":28},[],102547482,[71,72,73],"静止","向下滑动","临界下滑状态","图中重物放在斜面上,G=10N,α=30°,静摩擦系数f=0.5,则物体 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe54c626fc0872e8309706f0423ff3f95.png\">",{"answer":76,"createTime":5,"id":77,"options":78,"question":81,"source":27,"type":28},[],102547483,[71,79,80],"滑动",".临界平衡状态","重物重P放在粗糙水平面上,接触面间的摩擦角φm=20°.斜推力Q=P, α=30°,如图所示,则物块 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff794197abdf00ad9b46720c05b5525af.png\">",{"answer":83,"createTime":5,"id":84,"options":85,"question":90,"source":27,"type":28},[],102547484,[86,87,88,89],"F=fP","F=fG","F=G","F=P","图所示物块重G,在水平推力P作用下平衡.接触面间的静滑动摩擦系数为f,则物块与铅垂面间的摩擦力为 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcf9d31d882bd03ea4c00b47132f25755.png\">",{"answer":92,"createTime":5,"id":93,"options":94,"question":98,"source":27,"type":28},[],102547485,[95,96,97],"总是","不总是","总不是","物体的最大静滑动摩擦力 与物体的重量成正比"]