A car traveling 20 m/s rounds an 80 m radius horizontal curve with the tires on the verge of slipping. How fast can this car round a second curve of radius 320 m? (Assume the same coefficient of friction between the car's tires and each road surface. Does the centripetal acceleration change?)
a. 80 m/s
b. 70 m/s
c. 160 m/s
d. 30 m/s
e. 40 m/s
