(University and Graduate school) Must you be good in pure mathematics to do well in

[smile]

Physics? I consider myself generally good at Math (at least for my pre-university education), but I do rather poorly in analysis during university. I was also frightened by imaginary numbers and didn't feel very comfortable with differential equations.

I liked physics during my pre-university education like dynamics. But I don't do well in analogue electronics and don't really have a clue about radiation (they didn't teach much of it anyway).

I have graduated with a major in statistics, and am now considering going back to school to take courses in either physics or engineering, hopefully progressing down those paths.

Biology and Chemistry also fascinate me, but I am not good at Chemistry as I was in Physics. And the rote memorising of biology during high school kind of turned me off, so I didn't take it since.

I probably would like physical geography too, but how does it differ with biology when applied to natural phenomena?

What aspect of physics does astronomy use?
Distinguishing between pure mathematics and 'applied math'
or more like...what aspects of math do you need to be good in to excel in physics (depending on the aspects of physics)?