Fan can accelerate from the starting blocks to running 11m/s down the track in 5 seconds. What is her acceleration?

To answer this question we subtract the initial velocity from her final velocity. On the starting blocks the initial velocity was 0 m/s. Her final velocity was 11 m/s. t = 11m/s - 0 m/s, so the change in velocity is 11m/s. Time was 5 seconds. Plug it into the formula: 11 m/s : 5 s = 2.2 m/s 2