# An object travels North at #6 m/s# for #3 s# and then travels South at #5 m/s# for # 7 s#. What are the object's average speed and velocity?

##### 1 Answer

May 20, 2017

#### Answer:

Average speed is

Average velocity is

#### Explanation:

The total distance is

The total time is

Therefore the average speed is

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The total displacement is :

#18m " North" + 35m " South" = 17m " South"#

The total time is

Therefore the average velocity is

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Note that the average speed has no direction while the average velocity does (South).