The banked, circular highway curves are specifically designed for high-speed driving. To prevent vehicles from slipping outward, an 85 m radius highway curve is banked at a 28° inclination. Determine the maximum speed with which a high-speed car weighing 1800 kg can safely maneuver this curve without sliding off the road. The coefficient of friction between the tire and the road is 1.

• A. v = 65.1 m/s
• B. v = 22.6 m/s
• C. v = 52.4 m/s
• D. v = 38.6 m/s

Answer: (C)