The roller-coaster car has a speed v_A when it is at the crest of a vertical parabolic track. Determine the car’s velocity and the normal force it exerts on the track when it reaches point B. Neglect friction and the mass of the wheels. The total weight of the car and the passengers is W.

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Given: W = 350 lb ft VA= 15- S b = 200 ft h = 200 ft