express the answer with appropriate units

Part A A small car with mass 0.730 kg travels at constant speed on the inside of a track that is a vertical circle with radius 5.00 m (Figure 1). If the normal force exerted by the track on the car when it is at the top of the track (point B) is 6.00 N, what is the normal force on the car when it is at the bottom of the track (point A)? Express your answer with the appropriate units. O B ? F = Value Units Figure U 5.00 m A