At the equator, the radius of the earth is approximately 6370 km. A plane flies at a very low altitude at a constant speed of v = 286 m/s. Upon landing, the plane can produce an average deceleration of magnitude a = 18 m/s squared. part a) How long, in seconds, will it take the plane to circle the Earth at the equator ? part b) What is the minimum landing distance, in meters, this plane needs to come to rest ? Assume that, when the plane initially touches the ground, it is moving at the same speed as it was when it was flying