A race-car driver is driving her car at a record-breaking speed of 225 km/h. The first turn on the course is banked at 15°, and the car's mass is 1450kg. 1. If the car maintains a circular track around the curve (does not move up or down the bank), what is the magnitude of the force of static friction? Do I use this formula?: F(s) = mv^2 / r And do I find the radius, using the formula V = √(g r tan15°) 2. What is the coefficient of static friction necessary to ensure the safety of this turn? for this I use the formula µ(s) = F(s) / F(N) ?