[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fhyE0vJ-3ERUIyR29RW0HbUYySjv3bG7B1zIeEF6048A":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-12 18:05:32",60588950,[8,9,10,11],"物体在运动正方向的端点时,速度和加速度达到最大值","物体位于平衡位置且向负方向运动时,速度和加速度都为零","物体位于平衡位置且向负方向运动时,速度最大,加速度为零","物体处于负方向的端点时,速度最大,加速度为零",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"0f575884e65dd12ebc79665be8fdd8f5","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c1e48361b00f3ee2086f4e259ed792b.jpg","大学物理A1","work_27695813","第四章 机械振动与机械波 单元测试题","对一个作简谐振动的物体,下面哪种说法是正确的是( ).(单选题)",[21,32,35,44,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],60588949,[25,26,27,28],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcae224294334e1319ad7fbe1daee592c.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F83248cddac3f0d099129761ec72d9ee5.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa6e08fbd9cb596be3e664bf0917427fd.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c55c8bac0d3fdc95ef29ee90e74d789.webp\">","已知质点的振动方程为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F64c77fe5e38f6402e9cccb07b238448e.webp\">,当时间t=T\u002F4 时 (T为周期),质点的速度为( ).(单选题)","v1",0,{"answer":33,"createTime":5,"id":6,"options":34,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":30,"type":31},[],60588951,[39,40,41,42],"1","2\u002F3","4\u002F3","2","一质点在x轴上作简谐振动,振幅A=4cm,周期T=2s,其平衡位置取作坐标原点,若t=0时刻质点第一次通过x=-2cm处,且沿x轴负向运动,则质点第二次通过该处的时刻为( )s.(单选题)",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],60588952,[48,49,50,51],"A1+A2","A1-A2","A1+A2\u002F2","A1-A2\u002F2","两个同向同频率的简谐振动,振幅分别为A1和A2,他们的相位差为2π则合振动的振幅为( ).(单选题)",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],60588953,[57,58,59,60],"波长为12m","周期为1\u002F6s","波速为72m\u002Fs","波沿x轴正方向传播","一列机械波的表达式为y=0.2cos[6πt+(π\u002F12)x],则( ).(单选题)",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],60588954,[66,67,68,69],"-Aω2\u002F\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8054a6c52e4b961905f75bdcb8990aa9.webp\">","Aω2\u002F\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7ae610921c8924bac3312ac7fd345bd5.webp\">","-Aω2","2Aω2","一物体做简谐振动,振动方程为x=Acos(ωt+π\u002F4), 当时间t=T\u002F4(T为周期)时,物体的加速度为( ).(单选题)",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],60588955,[75,76,77,78],"x=0.12cos(πt+π\u002F3)","x=0.12cos(πt-π\u002F3)","x=0.12cos(2πt-π\u002F3)","x=0.12cos(2πt+π\u002F3)","一质点沿x轴作简谐振动,振幅为12cm,周期为2s.当t=0时,位移为6cm,且向x轴正方向运动,则振动表达式为( ).(单选题)",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],60588956,[84,85,86,87],"A","B","C","D","一个质点作简谐振动,振幅为A,在起始时刻质点的位移为A\u002F2且向x轴的正方向运动,代表此简谐振动的旋转矢量图为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb41b874167d059d7b17c590f966376ac.jpg\">(单选题)",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],60588957,[93,94,95,96],"r2-r1=kπ","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7c0e7b171d404e4d2edad2b9a0d66d83.webp\">-\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3006a369ba64f103edd43660ad60252d.webp\">=2kπ","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbf45a812de2c9e0b047ed376d33c956e.webp\">\u002Fλ=2kπ","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb49803d884f2bea56fed7b8128e21913.webp\">\u002Fλ=2kπ","如图所示,两列波长为λ的相干波在点P相遇.波在点\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe4dd70bdfc5f939ecf5172f85e8e63a6.webp\">振动的初相位是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3006a369ba64f103edd43660ad60252d.webp\">,点\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe4dd70bdfc5f939ecf5172f85e8e63a6.webp\">到P点的距离是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe8b542b8b609cdbf80ba0e37c974c6e9.webp\">.波在点\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F28306925e0f3f435d9d7b69450c301a9.webp\">的初相位是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7c0e7b171d404e4d2edad2b9a0d66d83.webp\">,点\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F28306925e0f3f435d9d7b69450c301a9.webp\">到点P的距离是\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F271841477c7ed138e0a2c4a5c1e9d6de.webp\">.以k代表零或正、负整数,则点P的干涉极大的条件为()(单选题)",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],60588958,[102,103,104,105],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F51b40a78d52d0ef2a76b2c98168365ff.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F91977b392ac1b811380fd831d36aa1e7.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcf4a3c981af62ae923789bcc20944e6f.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6615824bc8ed3c1df1e0e84011b098e9.webp\">","波源的振动方程为y=6cos(π\u002F5)t,它所形成的波以2m\u002Fs的速度沿x轴正方传播,则沿x轴正方向上距波源6m处一点的振动方程为( ).(单选题)"]