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