A driver of a car is driving around in circles with a diameter of 100 ft. The driver is traveling 20 mpg when he accidentally fires his 1500 pound thrust rocket. Assume that the tires have a coefficient of friction Us=0.8 and that the force applied by the engine and brakes are negligible. What is the maximum velocity that the car can achieve before the tires begin to slip? How long will it take to reach that velocity from the instant the rocket is fired?