2. Determine the required height h of a roller coaster so that when it is essentially at rest at the crest of the hill A, it will reach a speed of 108 km/h when it comes to the bottom B. Also, what should be the minimum radius of curvature p for the track at B so that the passengers do not experience a normal force greater than 4mg N? Neglect the size of the car and passenger. (15 pts) A B

Fig: 1