A small model car with mass m travels at constant speed on the inside of a track that is a vertical circle with radius r = 3.00 m (Figure 1). The normal force exerted by the track on the car when it is at the bottom of the track (point A ) is equal to 2.50 mg. Figure 1 of 1 Part A How much time does it take the car to complete one revolution around the track. t =