A speed car racer averaged 378.11 km/h in the duration of the race. The ends of the tracks are banked at 18 degrees and have a radius of curvature of 382 m. Did the driver rely on friction for the required centripetal force? I have a diagram, but it wont paste on here. I am not sure what to do. So far I just ignored the average speed and calculated another speed...which makes no sense. and my v ended up being 1216.4m/s ---Overall I don't know how to solve.