[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fkgtz-PqCK3852v7-2zUofBYIRutYXaZ1oR0ffU79Wdg":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-10 16:25:14",56989490,[8,9,10,11],"π","π\u002F2","0","θ",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},12,"58c89576e652b0ab2d6bc5cc59a48f02","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fefc8e711706296d71f8359e498151e97.png","大学物理（上）","work_27931021","机械振动作业","把单摆摆球从平衡位置向位移正方向拉开,使摆线与竖直方向成一微小角度θ,然后由静止放手任其振动,从放手时开始计时.若用余弦函数表示其运动方程,则该单摆振动的初相为( )",[21,32,41,50,56,65,68,77,86,95],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],56989485,[25,26,27,28],"竖直放置作简谐振动,在光滑斜面上不作简谐振动","竖直放置不作简谐振动,在光滑斜面上作简谐振动","两种情况都作简谐振动","两种情况都不作简谐振动","一弹簧振子,当把它水平放置时,它作简谐振动.若把它竖直放置或放在光滑斜面上,试判断下列情况正确的是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],56989486,[36,37,38,39],"T\u002F4","T\u002F12","T\u002F6","T\u002F8","一个质点作简谐振动,周期为T,当质点由平衡位置向x轴正方向运动时,由平衡位置到二分之一最大位移这段路程所需要的最短时间为( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],56989487,[45,46,47,48],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdf7cf6ee8bc5b38808a0848b178a5f2b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F04b558b2f94454c012d18d5c49042369.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F987c9d0dd6ecea09d5ba82c8eca86856.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb725f1e75136e9a9c240e29a67814ed4.png\">","轻弹簧上端固定,下系一质量为m1的物体,稳定后在m1下边又系一质量为m2的物体,于是弹簧又伸长了Δx.若将m2移去,并令其振动,则振动周期为( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":55,"source":30,"type":31},[],56989488,[9,8,54,10],"-π\u002F2","两个简谐振动的振动曲线如图所示,若这两个简谐振动可叠加,则合成的余弦振动的初相为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F19a5fd9da724e391cb6f11b76dfb2070.jpg\">",{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":30,"type":31},[],56989489,[60,61,62,63],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffaaf824166eed9dda84f3577889546d9.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe128b0235e77fbdc5fab7567f2a89c80.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F29550616c549dd0bb86ab665ba6b4aee.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F036b0e07d032864497108e6f2ff7c44d.png\">","两个质点各自作简谐振动,它们的振幅相同,周期相同.第一个质点的振动方程为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3fed6a330d29554d5efed712f9d1008.png\">.当第一个质点从相对于其平衡位置的正位移处回到平衡位置时,第二个质点正在最大正位移处,则第二个质点的振动方程为( )",{"answer":66,"createTime":5,"id":6,"options":67,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],56989491,[72,73,74,75],"T1′> T1且T2′> T2","T1′< T1且T2′< T2","T1′= T1且T2′= T2","T1′= T1且T2′> T2","一个弹簧振子和一个单摆(只考虑小幅度摆动),在地面上的固有振动周期分别为T1和T2.将它们拿到月球上去,相应的周期分别为T1′和T2′.则有( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],56989492,[81,82,83,84],"−Aωsinφ","Aωsinφ","−Aωcosφ","Aωcosφ","一质点作简谐振动,振动方程为x=Acos(ωt+φ),当时间t = T\u002F2(T为周期)时,质点的速度为( )",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],56989493,[90,91,92,93],"2.62 s","2.40 s","2.20 s","2.00 s","一简谐振动曲线如图所示.则振动周期是( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F97cad557ab46537f1428bb732e8b3429.jpg\">",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],56989494,[99,100,101,102],"竖直放置可作简谐振动,放在光滑斜面上不能作简谐振动","竖直放置不能作简谐振动,放在光滑斜面上可作简谐振动","两种情况都可作简谐振动","两种情况都不能作简谐振","一弹簧振子,当把它水平放置时,它可以作简谐振动.若把它竖直放置或放在固定的光滑斜面上,试判断下面哪种情况是正确的( )"]