This sounds like the classic “Physics for Poets” sort of course that one sometimes encounters in college. It’s always a challenge trying to learn Physics without some facility with math at least through trigonometry. That’s probably why 9th graders typically take biology or even chemistry, both of which can be presented with basic algebra without losing the script.
If your daughter has the facility with math, is it possible for her to switch to a more mathematically focused course? Otherwise, is there another section with another teacher - perhaps the material could be presented in a more engaging and coherent way by someone else? I do fear, though, that it is the nature of the subject that if you are going to present the concepts without the mathematical underpinnings to students who in any event don’t really have the requisite math facility, then it is going to be a tough slog.