Suppose a plane accelerates from rest for 30 s, achieving a takeoff speed of 80 m/s after traveling a distance of 1200 m down the runway. a smaller plane with the same acceleration has a takeoff speed of 40 m/s. starting from rest, after what distance will this smaller plane reach its takeoff speed? knight, randall d., (professor emeritus). college physics (p. 64). pearson education. kindle edition.