For many years colonel john p. stapp, usaf, held the world's land speed record. he participated in studying whether a jet pilot could survive emergency ejection. on march 19, 1954, he rode a rocket-propelled sled that moved down a track at a speed of 632 mi/h. he and the sled were safely brought to rest in 1.40s

(a) determine the negative acceleration he experienced.
__ m/s2
(b) determine the distance he traveled during this negative acceleration.
__ m.