if u let x=30 degrees, N=reaction , F=friction and resolve forces horizontally and vertically, you end up with
Equation 1: Nsinx + Fcosx= (mv^2)/r
Equation 2: Ncosx - Fsinx = mg
(Equation 1 times sinx) + (Equation 2 times cosx)= N
(Equation 1 times cosx) - (Equation 2 times sinx) = F
With...