A swimmer is swimming to the left with a speed of 1.0\,\dfrac{\text m}{\text s}1.0 s m 1, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction when she starts to speed up with constant acceleration. The swimmer reaches a final speed of 2.5\,\dfrac{\text m}{\text s}2.5 s m 2, point, 5, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction over a distance of 5.0\,\text m5.0m5, point, 0, start text, m, end text. How long did the swimmer take to speed up to 2.5\,\dfrac{\text m}{\text s}2.5 s m 2, point, 5, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction?