An object travels North at #6 m/s# for #2 s# and then travels South at #1 m/s# for #7 s#. What are the object's average speed and velocity?

1 Answer
Narad T.
Jun 22, 2017

The average speed is #=2.11ms^-1#
The average velocity is #=0.56ms^-1#

Explanation:

The total distance travelled is #d=6*2+1*7=19m#

The total time is #t=2+7=9s#

The average speed is #d/t=19/9=2.11ms^-1#

The total displacement is #d'=12-7=5m#

The average velocity is #d'/t=5/9=0.56ms^-1#

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