일반물리학 1 — Force and Motion-II: Problem 56

56 A banked circular highway curve is designed for traffic moving at 65 km/h. The radius of the curve is 200 m. Traffic is moving along the highway at 40 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? (Assume the cars do not have negative lift.)