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

##### 1 Answer

May 9, 2017

#### Explanation:

The displacement of the object going

The displacement of the object going

We can take ** #S# as the positive direction** in this case where

*displacement*is:

Time taken for the displacement is:

Average velocity is the displacement divided by the total time:

The total *distance* traveled is #4m+8m=12m

Average speed is the distance traveled divided by the time.