I’m a senior in HS who was accepted as a physics major at UGA. I have only taken math up to AP Calculus BC, and one AP physics course. Will I struggle because of my relatively small amount of prior physics knowledge?
Not at all. You’ll start with the introductory calculus based physics sequence. This sequence assumes no prior knowledge of any physics. It starts from the ground up and develops physics from the beginning. It assumes knowledge of fairly basic differential and integral calculus, which you’ve gotten in AP Calc, and fluent algebra skills. A lot of physics majors don’t even take any physics in high school. For a lot of them, their first exposure to physics in an academic sense is in college. The key is to be solid in math. You’ve got that, and you’ve also got some exposure to physics. You should be adequately prepared.
You are actually ahead of the minimum expectation for starting a physics major, which is to be ready for calculus as a first semester frosh (i.e. completion of precalculus in high school) and have had high school physics (often a recommended prerequisite for calculus-based physics that you will take as a physics major).
I’ll echo the other two: you’ll be good-to-go!