hello. i am confused on what forumla in particular you use to figure the answer out? A certain elevator cab has a total run of 209 m and a maximum speed is 322 m/min, and it accelerates from rest and then back to rest at 1.16 m/s2. (a) How far does the cab move while accelerating to full speed from rest? (b) How long does it take to make the nonstop 209 m run, starting and ending at rest?