A runner whose initial speed is 29km/h increases her speed to 31km/h in order to win a race. If the runner takes 5.0s to complete this increase in her speed, what is her accelration

jordanh  Oct 25, 2017

1+0 Answers



Average velocity = \(a\) =\(\frac{{x}_{f} - {x}_{i}} {{t}_{f} - {t}_{i}}\)


\({x}_{f}\)= Final position

\({x}_{i}\)= Initial position

\({t}_{f}\)= Final time

\({t}_{i}\)= Initial time


Acceleration = \(\frac{Velocity}{Time}\)


That is what I can do for sure, but I am not able to solve that right now. Maybe you can figure the answer out yourself with these formulas?

Mr.Owl  Oct 25, 2017

10 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details