Before 1960, people believed that the maximum attainable coefficient of static friction for an automobile tire on a roadway was us = 1. Around 1962, three companies independently developed racing tires with coefficients of 1.6. This problem shows that tires have improved further since then. The shortest time interval in which a piston-engine car initially at rest has covered a distance of one-quarter mile is about 4.43 5. sq: IL: m L'hiis 00ml lhlhnnxshul smock mm 9 (a) Assume the car's rear wheels lift the front wheels off the pavement as shown in the figure above. What minimum value of us is necessary to achieve the record time? :l (b) Suppose the driver were able to increase his or her engine power, keeping other things equal. How would this change affect the elapsed time