*14-76. The roller coaster car having a mass m is released from rest at point A. If the track is to be designed so that the car does not leave it at B, determine the required height h. Also, find the speed of the car when it reaches point C. Neglect friction. Ans: h=23.75 m and ve=21.6 m/s Part B. Describe the locations when the car would have the 1. Minimum normal acceleration 2. Maximum normal acceleration 3. Negative normal acceleration 4. Maximum positive tangential acceleration 5. Maximum negative tangential acceleration B 7.5 m I 20 m A key assumption to make on this problem is that the normal force at B (from the track) is zero (the car is about to 'leave the track').

Fig: 1