【西北卷】【山西卷】山西省太原市2024-2025学年高三年级第一（上）学期期中学业诊断考试（11.12-11.13）物理试卷答案.docx

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2024~2025学年第一学期高三年级期中学业诊断

物理参考答案及评分建议

一、单项选择题：本题包含7小题，每小题4分，共28分。

题号

1

2

3

4

5

6

7

选项

C

B

B

A

D

C

A

二、多项选择题：本题包含3小题，每小题6分，共18分。在每小题给出的四个选项中，至少有两个选项正确，全部选对的得6分，选对但不全的得3分，有选错的得0分。

题号

8

9

10

选项

BC

CD

ACD

三、实验题：本题包含2小题，共16分。请将正确答案填在题中横线上或按要求作答。11.（7分）

6.70

12.(9分)

（1）A（1分）（2）错误（1分）（3）0.820（2分）（4）（3分）（5）直线（2分）

四、计算题：本题包含3小题，共38分。13.（8分）

（1）由题意可知在深度为d的深井处，半径为R-d的球体吸引物体

=mJ1···································································

2

极地地表处

mJ········································································（1分）

MπR3ρ

g1g·········································································（1分）

（2）地球内部的重力加速度大小与到地心的距离成正比

·····································································（1分）

由地表至井底深处,由动能定理

·dmv2-0··································································（2分）

vJd··································································（1分）

14.（12分）

（1）物体A、B整体静止

(mA+mB)gsinθ=kx······························································（2分）

x=0.4m············································································（1分）

（2）物体B由静止向上做匀加速直线运动，位移为x1=0.1m时，物体A、B间弹力消失，此位置物体B

k(x?x1)?mBJsinθ=mBa··············································（2分）

a=2.5m/s2············································