A curve in a speed track has a radius of 200 m and a rated speed 0f 180km/h. (See Sample P...

A curve in a speed track has a radius of 200 m and a rated speed 0f 180km/h. (See Sample Prob. 12.6 for the definition of rated speed.) Knowing that a racing car starts skidding on the curve when traveling at a speed of 320 km/h, determine (a) the banking angle θ (b) the coefficient of static friction between the tires and the track under the prevailing conditions, (c)the minimum speed at which the same car could negotiate that curve.

Fig. P12.53