This is probably very simple, but it's causing me problems. I keep coming up with VERY unrealistic times. Any help would be greatly appreciated! One simple model for a person running the 100 m dash is to assume the sprinter runs with constant acceleration until reaching top speed, then maintains that speed through the finish line. If a sprinter reaches his top speed of 11.3 m/s in 2.54 s, what will be his total time?