Get your hands on a physics EK book, and memorize ALL the equations they tell you to at the end of the chapters.
Q=Av
F/A = F/A
Fd = Fd
E = kq/r^2
U = vQ
U = (1/2)QV
U = EqD
Fb = pVg
Those are just some of the "basic" equations off the top of my head, but see how they're still kinda out there? You have to know them though. If you memorize all the EK physics equations, it'll have the PS section infinitely easier.
I wish they did that for Chemistry too. But there aren't too many chem. equations.