Is it possible to get a 9 in physics?

I do aqa combined trilogy higher for science and for mocks I have gotten-

Physics paper 1- 45/70 =7

Physics paper 2- 43/70 =8

I have managed to get a 7/8 in Physics but really want to aim for a 89 or 99 as that is what i know i can get in biology and chemistry. However Physics is the one I struggle the most with and have put the most work in out of all of my subjects other than English. And with that I have only been 7s-8s in it and it has been a lot of work.

Is it possible to get a 9 in Physics without sacrificing other subjects?

With Physics there are some topics that I really get but then there are some that I dont really which is what I think is bringing my grade down.