The air force has conducted many studies on the effects of large accelerations on the human body. in one such study, lt. col. john l. stapp rode a rocket sled that started from rest and attained a speed of 280 m/s in 5 s. the sled was then brought to rest in 1.5 s. what acceleration did lt. col. stapp experience in the first 5 s? how far did the sled travel during this time? what acceleration was experienced in the last 1.5 s? how far did the sled travel in that time?