Hi, I'm having trouble with this question. I don't seem to get this at all. I hope you guys can help me on this.
Before 1960, it was believed that the maximum attainable coefficient of static friction for an automobile tire was less than 1. Then, about 1962, three companies independently developed racing tires with coefficients of 1.6. Since then, tires have improved, as illustrated in this problem. According to the 1990 Guinness Book of Records, the shortest time in which a piston-engine car initially at rest has covered a distance of one-quarter mile is 4.96 s. This record was set by Shirley Muldowney in September 1989.
Assume that, as in the figure, the rear wheels lifted the front wheels off the pavement. What minimum value of µs is necessary to achieve a time of 6.04 s?