Right now I'm doing my cardiac acute care rotation. Just the other day asked my Clinical instructor asked me the logistics behind how an EKG monitors the electricity of the heart. She was impressed when I gave an entirely correct answer. With enough incorrect answers, I could fail my clinical and have to repeat the entire first year. I hope these examples are enough to show you that PT is not just about Biology and muscles.
Jobs are more difficult to find.
So, you have to know your a little bit of everything and be more creative. A good PT generalist is hard to find, but that is what Shenandoah graduates are. Good luck to everyone. Don't worry, Physics is not as painful as you think. If PT is what you want to do, then you'll pass with no problems.