A banked circular highway curve is designed for traffic moving at 64 km/h. The radius of the curve is 215 m. Traffic is moving along the highway at...

A banked circular highway curve is designed for traffic moving at 64 km/h. The radius of the curve is 215 m. Traffic is moving along the highway at 44 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn without sliding off the road?