480 UMS for an A
360 UMS for a C
You have between 36 and 41 out of 60 UMS for your practical exam.
Surely now you can work out that it is possible. You can get an A in A-Level Physics without even taking AS or A2 practical exams. (But not A*)
I got a U in AS Physics practical exams (13 UMS) but I am aiming for an A which I think is in reach, although I am retaking those practicals in 2 weeks. Of course it is possible, do the maths.