四川省泸州市泸县第五中学2025-2026学年高一上学期第一次月考物理试题（含答案）含答案解析

这是一份四川省泸州市泸县第五中学2025-2026学年高一上学期第一次月考物理试题（含答案）含答案解析，文件包含高2025级高一上期第一学月考试物理试题docx、高一物理答案docx等2份试卷配套教学资源，其中试卷共10页， 欢迎下载使用。
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
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
题号
1
2
3
4
5
6
7
8
9
10
答案
D
C
C
A
D
C
C
ABC
BC
AD