Question

QUESTION 17 A person driving a car up a 8 degree slope brakes suddenly and the car begins to skid up the slope. The mass of the car is 1,408 and the coefficient of kinetic friction between the wheels and the surface is 0.37. Assume that the car was heading straight up the slope when the skid began. What is the magnitude of the (along- slope) acceleration experienced by the car? Give your answer in ms-1 to the nearest cm. QUESTION 18 A 558 kg car is turning a banked curve at 76 kph (km hr-1). The angle of the bank is 7, the radius is 208 and the curve is rated for 30 kph. What is the magnitude of the friction force is required for the car to stay in its lane? Use 9.8 ms for the acceleration due to gravity. Please give your answer in Newtons to the nearest Newton.

Answer 1

solution An masinot umangasol as the car does not have upward force can is de acclerated and ng sino . so the by friction f = mg cos o . mg sino + 4ng coso = ma z) 9.81 x sin 8°+ 0.37 x 9.81 x cos 8° - 9 a = 4.959 ms2 a= 4.96 e m/s2