# An object travels North at #6 m/s# for #9 s# and then travels South at #6 m/s# for #7 s#. What are the object's average speed and velocity?

##### 1 Answer

Feb 20, 2017

The average speed is 6m/s; the average velocity is 0.75 m/s North.

#### Explanation:

First, we must determine the displacement of the object during each time interval.

During the first 9s

During the next 7s

For the average *speed* , we consider only the total distance travelled and the total time taken

For the average *velocity* , we consider the net displacement and the time taken. The net displacement has been only 12 m North.