Show how to derive the formula

[9 marks] 9. Railroad tracks are banked at curves to reduce wear and stress on the wheel flanges and rails, and to prevent the train from tipping over. If a set of tracks is banked at an angle of 5.7' from the horizontal and follows a curve of radius 5.5 x 10^2 m, what is the ideal speed for a train rounding the curve? [C2] a) Draw a FBD. Show your direction of x- and y- axes. [A3] b) Resolve the forces into x- and y- components. [T4] c) Find the speed. Communication of the problem: GRASS method - Clear Diagram - Significant figures