# An object travels North at  5 m/s for 3 s and then travels South at  1 m/s for  4 s. What are the object's average speed and velocity?

Average speed = $\frac{19}{7}$m/s
Average velocity=$\frac{11}{7}$m/s
The distance$= 5 \cdot 3 + 1 \cdot 4 = 19 m$
Averagr=$\frac{19}{3 + 4} = \frac{19}{7}$m/s
The displacement$= 5 \cdot 3 - 1 \cdot 4 = 11 m$
Average velocity$= \frac{11}{3 + 4} = \frac{11}{7}$m/s