# An object travels North at #7 m/s# for #3 s# and then travels South at #9 m/s# for # 4 s#. What are the object's average speed and velocity?

##### 1 Answer

Jan 29, 2017

Average speed is

#### Explanation:

As the object travels North at

the displacement is

then the object travels South at

the displacement is

Hence, net displacement is

As total distance covered is

average speed is

But average velocity is