Answer :
[tex]V= \frac{\Delta S}{\Delta t} = \frac{5}{15} = \frac{1}{3} m/s[/tex]
Average speed = (distance covered) / (time to cover the distance) =
(5m) / (15 sec) =
(5/15) (m/s) = 1/3 m/s .
Average velocity =
(displacement) / (time spent traveling) in the direction of the displacement
Average velocity = (5m) / (15 sec) left =
(5/15) / (m/sec) left =
1/3 m/s left.
A number without a direction is a speed, not a velocity.