# An object travels North at  5 m/s for 2 s and then travels South at  1 m/s for  4 s. What are the object's average speed and velocity?

Apr 28, 2016

$\text{speed=} \frac{7}{3} \frac{m}{s}$
$\text{velocity=} 1 \frac{m}{s}$

#### Explanation:

$\text{total distance=AB+CD=10+4=14 meters}$
$\text{total time=2+4=6 s}$

"speed="("total displacement")/("total time")

$\text{speed=} \frac{14}{6}$

$\text{speed=} \frac{7}{3} \frac{m}{s}$

"velocity="("displacement")/("total time")

$\text{velocity=} = \frac{6}{6}$

$\text{velocity=} 1 \frac{m}{s}$