高一物理答案_2025年10月高一试卷_251029四川省泸州市泸县第五中学2025-2026学年高一上学期10月月考（全）

高2025级高一上期第一学月考试 物理参考答案 题号 1 2 3 4 5 6 7 8 9 10 答案 D C C A D C C ABC BC AD 11．(1) (2)B 12．(1)5.85 /5.84/ 5.86 (2) 0.1/0.10 0.280 0.200 (3) 速度随时间均匀增加 13．解：（1）令汽车加速过程中的时间为t，则由题意有 ·································································2分 解得 ·····································································1分 所以减速过程中的加速度为 ···············································2分 加速过程中的加速度为 ···············································2分 （2）开始刹车后2s末的瞬时速度为 ················································2分 刹车后10s末也就是加速2s末的速度，根据速度时间关系有 ·························1分 14．解：（1）过B点作CD的垂线，设垂足为G点，根据几何关系有 ，·············2分 ·······················································2分李老师从C处运动到B处的过程中的位移x与CD夹角的正切值 ·············2分 代入相关已知数据，联立解得 ·················································2分 （2）根据几何关系有 ··············································2分 李老师从C处运动到D处所用的时间 ···········································1分 李老师从C处运动到B处的过程中的平均速度大小 ·····························2分 联立，代入相关已知数据解得v＝0.8m/s·················································2分 15．解：（1）两车第一次断开连接时，两车的距离刚好为L，则有 ········1分 其中 ······································································1分 ································································1分 联立解得 ·或 ··························································2分 而当 时，A车的位移 ··············································1分 B车的位移 ·························································1分 故此时两车的距离 ···································1分 两车已经中断连接，故第一次中断时刻为2s。 （2）6s后， 时，二者水平距离 ，此时 ，则有 ············1分 代入可得 ····················································2分 其中 ································································1分 解得 ·······································································1分 A车在前，B车在后，或 ···················································1分 A车在后，B车在前，26s后，水平距离越来越大，无法连接，故AB保持连接的时间························2分