[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f4M88Ze1z_4NiQ47aOQ9eOZBOn8StN1oPeTnlOoXMcDM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":25,"type":68},[],"2026-01-16 03:49:17",313114622,[8,9],"正确","错误",{"courseId":11,"courseImg":12,"courseName":13},"71caac28dcd060f918efb74b0f116f2a","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff2f1bd7e9646e57c997d084441946925.jpg","四期-工程力学(理论力学)","一点如果在某瞬时的法向加速度等于零,而其切向加速度不等于零,则该点一定作直线运动",[16,27,36,45,54,63,69,74,79,84],{"answer":17,"createTime":5,"id":18,"options":19,"question":24,"source":25,"type":26},[],313114613,[20,21,22,23],"是直线","是平面曲线","是空间曲线","不能确定","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9944c7b4ec949cae0524187d8fa2d388.PNG\">","v1",0,{"answer":28,"createTime":5,"id":29,"options":30,"question":35,"source":25,"type":26},[],313114614,[31,32,33,34],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd942aeac930d21d51bedc42ba7c6618d.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa47732cc8f165c4a2f7f7cf914b5dbb7.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0a689cefd89d16979e43471ad4ccd3d0.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc102ebc80c09651621fd8ec938cd29c7.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F70f37d5b24fd8a7667992a476be2edfe.PNG\">",{"answer":37,"createTime":5,"id":38,"options":39,"question":44,"source":25,"type":26},[],313114615,[40,41,42,43],"2m\u002Fs","18m\u002Fs","12m\u002Fs","无法确定","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F62010d11bcaed038acffb9594f8faa42.PNG\">",{"answer":46,"createTime":5,"id":47,"options":48,"question":53,"source":25,"type":26},[],313114616,[49,50,51,52],"越来越大","越来越小","大小变化不能确定","大小保持不变","点作圆周运动,若其法向加速度越来越大,则该点的速度_______________",{"answer":55,"createTime":5,"id":56,"options":57,"question":62,"source":25,"type":26},[],313114617,[58,59,60,61],"匀速运动","匀加速运动","匀减速运动","变速运动","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faf30c47f080f20aab8d0b1d2ea58ee7b.PNG\">",{"answer":64,"createTime":5,"id":65,"options":66,"question":67,"source":25,"type":68},[],313114618,[8,9],"由于加速度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcbac3191a023dd3f36c257232f3ce3a1.webp\">永远位于轨迹上动点处的密切面内,故\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc96d0e677325d80af0fe3e4723711221.webp\">在副法线上的投影恒等于零",3,{"answer":70,"createTime":5,"id":71,"options":72,"question":73,"source":25,"type":68},[],313114619,[8,9],"已知直角坐标描述的点的运动方程为x=f1(t),y=f2(t),z=f3(t),则任一瞬时点的速度、加速度即可确定",{"answer":75,"createTime":5,"id":76,"options":77,"question":78,"source":25,"type":68},[],313114620,[8,9],"已知点运动的轨迹,并且确定了原点,则用弧坐标s(t)可以完全确定动点在轨迹上的位置",{"answer":80,"createTime":5,"id":81,"options":82,"question":83,"source":25,"type":68},[],313114621,[8,9],"已知自然法描述的点的运动方程为s=f(t),则任一瞬时点的速度、加速度即可确定",{"answer":85,"createTime":5,"id":6,"options":86,"question":14,"source":25,"type":68},[],[8,9]]