In October 1997, Andy Green broke the sound barrier on land in a jet-powered car traveling at 763 mi/h over a 1.0-mi course. As it arrived at the beginning of this measured mile, Green's car had accelerated from rest to 763 mi/h over a 5.0-mi stretch
A) What was Green's average acceleration in that 5.0 mi?
B) Calculate the time interval needed for Green to reach his maximum speed.