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a curve of radius 68 m is banked for a design speed of 85 km/h. If...

a curve of radius 68 m is banked for a design speed of 85 km/h. If the coefficient of static friction is 0.40 (wet pavement), at what range of speeds can a car safely make the curve? [Hint: Consider the direction of the friction force when the car goes too slow or too fast.] EXPRESS answer in km/h

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