Banket Curved I. A curve with a 120 m radius on a level road is banked at thecor

Question

Banket Curved I. A curve with a 120 m radius on a level road is banked at thecorrect angle for a speed of 20 m/s. If an automobile roundsthis curve at 30 m/s, what is the minimum coefficient of staticfriction needed between tires and road to prevent skidding? Banket Curved I. A curve with a 120 m radius on a level road is banked at thecorrect angle for a speed of 20 m/s. If an automobile roundsthis curve at 30 m/s, what is the minimum coefficient of staticfriction needed between tires and road to prevent skidding?

Explanation / Answer

Radius r = 120 m speed v = 30 m /s we know v = [ r g ] from this minimum coefficient of static friction neededbetween tires and road to prevent skidding is            = v^ 2 / rg              = 30^2 / ( 120 * 9.8 )             = 900 / ( 120 *9.8 )              = 0.765

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