Two banked curves on a highway have the same radius. Curve A is banked at 13 degrees and highway B is banked at 19 degrees. A car can travel around curve A without relying on friction at a speed of 18 m/s. At what speed can this car travel around curve B without relying on friction?

Answer 1

A roadway is designed for traffic moving at a speed of 68 m/s. A curved section of the roadway is a circular arc of 140 m radius. The roadway is banked--so that a vehicle can go around the curve--with the lateral friction forces equal to zero. The angle at which the roadway is banked is closest to:
Select one:
a. 73°
b. 67°
c. 75°
d. 69°
e. 71°

Answer 2

14.7 m/s