main
HuangHai 2 weeks ago
parent 70a1baeca1
commit 1b0d2f8fea

@ -9,7 +9,7 @@ async def main():
file_path = "ShiTi/Docx/《动能定理》巩固练习.docx" file_path = "ShiTi/Docx/《动能定理》巩固练习.docx"
# 转换docx为md # 转换docx为md
get_docx_content_by_pandoc(file_path,'.') get_docx_content_by_pandoc(file_path,'结果.md')
# """ # """

@ -46,8 +46,10 @@ def get_docx_content_by_pandoc(docx_file, output_file=None):
content += line.strip().replace("**", "") + "\n" content += line.strip().replace("**", "") + "\n"
content = content.replace("\phantom", "") content = content.replace("\phantom", "")
# 将content回写到markdown文件 # 将content回写到markdown文件
if output_file is None: if output_file is not None:
with open(output_file, 'w', encoding='utf-8') as f: with open(output_file, 'w', encoding='utf-8') as f:
f.write(content) f.write(content)
print("Conversion completed successfully!") print("Conversion completed successfully!")
# 删除临时文件
os.remove(temp_markdown)
return content.replace("\n\n", "\n").replace("\\", "") return content.replace("\n\n", "\n").replace("\\", "")

Binary file not shown.

After

Width:  |  Height:  |  Size: 5.7 KiB

Binary file not shown.

After

Width:  |  Height:  |  Size: 5.7 KiB

@ -0,0 +1,13 @@
【题型】不定项选择
【题文】如图所示,固定斜面倾角为*θ*,整个斜面分为*AB*、*BC*两段,*AB*2*BC*.小物块*P*(可视为质点)与*AB*、*BC*两段斜面间的动摩擦因数分别为*μ*~1~、*μ*~2~.已知*P*由静止开始从*A*点释放,恰好能滑动到*C*点而停下,那么*θ*、*μ*~1~、*μ*~2~间应满足的关系是(  )
![5-40.tif](./static/Images/6855d84768e44d74ad95dfb7033bcf40/media/image1.png){width="0.9847222222222223in"
height="0.6979166666666666in"}A$tan\theta\text{}\frac{\mu_{1} + 2\mu_{2}}{3}$
B$tan\theta\text{}\frac{2\mu_{1} + \mu_{2}}{3}$
C$tan\theta\text{}2\mu_{1} - \mu_{2}$
D$tan\theta\text{}2\mu_{2} - \mu_{1}$
【答案】 B
【解析】设斜面的长度为*l*,小物块从斜面顶端下滑到斜面底端的全过程由动能定理得:
$$mglsin\theta\text{}\mu_{1}mg\frac{2l}{3}cos\theta\text{}\mu_{2}mg\frac{l}{3}cos\theta\text{}0$$
解得$tan\theta\text{}\frac{2\mu_{1} + \mu_{2}}{3}$故B正确
【知识点】动能定理
【难度】中
Loading…
Cancel
Save