To test the performance of its tires, a car travels along a perfectly flat ( no banking ) cir- cular track of radius 266 m. The car increases it's speed at uniform rate of d lul 1.23 m/s dt until the tires start to skid. If the tires start to skid when the car reaches a speed of $6.2 m/s. what is the coefficient of static friction between the tires and the road? The acceleration of gravity is 9.8 m/s