If the velocity of an object is changing at a uniform rate, for intitial velocity u and final velocity v the average velocity Vav is given by
1
\(\rm{V_{av}}=\frac{{u + v}}{2}\)
2
\(\rm{V_{av}}=\frac{{u - v}}{2}\)
3
\(\rm{V_{av}}=\frac{{u \times v}}{2}\)
4
\(\rm{V_{av}}=\frac{\sqrt{u + v}}{2}\)