I am the same major as the one upstairs, and I am also a major in mathematics and applied mathematics. Last semester of sophomore year, our school took physics as an elective course. I studied several professional courses such as ordinary differential equations this year. After a period of study, I found that mathematics and physics are closely related. It seems that some things in mathematics serve physics. I think it's a good choice for you to take the physics exam across majors. But if you can't pass, don't pass. Nowadays, many people generally think that accounting, economics and computer should be tested in mathematics cross-majors. But I personally think that the public's eyes may not be correct according to their own interests, and the truth is in the hands of a few people.