Just an instant before reaching the very bottom of a semicircular section of a roller coaster ride, the automatic emergency brake inadvertently goes on. Assume the car has a total mass of 850 kg, the radius of that section of the track is 53.0 m, and the car entered the bottom after descending vertically (from rest) 25.0 m on a frictionless straight incline. If the braking force is a steady 1700N, determine
1) the cars centripetal acceleration (including direction)
2) The normal force of the track on the car
3) the tangential acceleration (including direction), and
4) the total acceleration of the car.