江苏省淮安市高中校协作体2023-2024学年高三上学期期中联考 物理答案
淮安市高中校协作体2023~2024学年度第一学期高三年级期中联考物理参考答案1.A2.C3.C4.D5.B6.C7.B8.C9.D10.C11.C12.Dd¿1t2md2l角速度平方13.(1)0.25m/s2,方向与运动方向相反;(2)60s【详解】(1)根据匀变速直线运动位移速度关系可得2ax=v2−v02其中x=2000m,v=54km/h=15m/s,v0=126km/h=35m/s解得a=−0.25m/s2…………………………………………………………(2分)可知动车进站加速度大小为0.25m/s2,方向与运动方向相反。…………………(1分)(2)动车速度变为v=54km/h后到停下...
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