The rated speed of a 200-meter banked highway curve is 50 km per hour. the radius of the highway curve is 250 meters and the coefficient of friction between the tires and the road surface is 0.50. What is the maximum speed at which the vehicle can round the curve without skidding? Express your answer in km per hour.

A 2500-lb passenger vehicle originally traveling on a straight and level road gets onto a section of the road with a horizontal curve of radius = 850 ft. If the vehicle was originally traveling at 55 mi/h, determine (a) the additional horsepower on the curve the vehicle must produce to maintain the original speed, (b) the total resistance force on the vehicle as it traverses the horizontal curve, and (c) the total horsepower. Assume that the vehicle is traveling at sea level and has a front cross-sectional area of 30 ft2. Show your solutions and answers.

A 4200 lb. automobile is traveling on a curve having a radius of 900 ft. If the acceleration of the automobile is 6 ft/s2, determine the constant speed in mph at which the automobile is travelling. a) 45 b50 c) 66 Od) 75 e) 81