A 1210-kg car and a 2240-kg pickup truck approach a curve on the expressway that has a radius of 281m. for the angle I got 17.7 As the car and truck round the curve at 66.3 , find the normal force on the car to the highway surface. As the car and truck round the curve at 66.3 , find the normal force on the truck to the highway surface. shouldn't the normal force be W*costheta?