How Does Newton's Law Apply to a Race Car on a Banked Track?

[tdusffx]

A race car travels 44m/s around a banked (45degree with the horizontal) circular (radius = 200m) track. What is the magnitude of the resultant force in N on the 80 kg driver of this car.

I've having a hard time setting up the free body diagram.

First I broke into Fx and Fy

Fx:

F - mg*sin(tetha) = 0

Fy:


I know I'm going to have to use the Fc = MAc ; Ac=V^2/R
Fn - mg*cos(tetha) - 0

I seriously don't know where I'm going with these equations...

 

[tdusffx]

grr..haha help please