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4. An exit ramp from I-75 has a radius of curvature of 70 m. The road itself is not banked. The coefficient of static friction

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4. An exit ramp from I-75 has a radius of curvature of 70 m. The road itself is not banked. The coefficient of static friction between rubber tires and asphalt is 0.8 and the coefficient of kinetic friction is 0.5. What is the maximum tangential speed a car can have when rounding the curve to avoid skidding

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