A toy car travels in a vertical loop one meter in diameter along a track. Part of its centripetal acceleration comes from the normal force of the track on the car. There is a minimum velocity the car must be traveling at in order to keep its wheels on the track. At this minimum velocity, the centripetal acceleration when the car is at the very top of the loop is due entirely to gravity. What is the minimum velocity the car must have at the top of the loop? Radius= .5m