A Car Enters a Horizontal, Curved Roadbed of Radius 50

Multiple Choice

A car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is 0.20. What is the maximum speed with which the car can safely negotiate the unbanked curve?

A) 5 m/s
B) 10 m/s
C) 20 m/s
D) 40 m/s
E) 100 m/s