An Automobile Moves on a Level Horizontal Road in a Circle

Multiple Choice

An automobile moves on a level horizontal road in a circle of radius 30 m.The coefficient of friction between tires and road is 0.50.The maximum speed with which this car can round this curve is:

A) 3.0 m/s
B) 4.9 m/s
C) 9.8 m/s
D) 12 m/s
E) 147 m/s