average velocity means the total displacement divided by the total time taken.
this is different from the average speed as velocity is a vector. when we take average we need to take into account the directions of velocity at different times.
if an object travels for time t1 with a uniform velocity
and for time t2 with a uniform velocity of
then the average velocity is
if a person travels for 1 hour covering a distance of 10 km in a straightline towards the North and then returns along the same straight line after 1 hour, then
v1 vector is 10kmph towards North.
v2 vector is 10 km ph towards South.
average velocity is 0. Average velocity is the net displacement divided by the time interval.