1. The problem statement, all variables and given/known data Derive the formula to calculate the angle at which the road should be banked to prevent the car from skidding(Ignore force of friction). 2. Relevant equations tan x = v^2/gr ----- answer mv^2/r = fc 3. The attempt at a solution I get how they derived the formula due to this website http://batesvilleinschools.com/physics/phynet/mechanics/circular%20motion/banked_no_friction.htm [Broken] My question is how can I do it, by putting mg in terms of horizontal and vertical components, instead of Fn.(I know the website explains why it makes more sense to do it that way, but I still want to know). My attempt: Forces in Y = 0: Fn - mg cos x = 0 Fn = mg cos x Forces in X: mg sin x = mv^2/r g sin x = v^2/r sin x = v^2 / gr --stuck not the same answer If someone can please explain what I am doing wrong much help appreciated.