An object travels North at 6 m/s6ms for 3 s3s and then travels South at 5 m/s5ms for 7 s7s. What are the object's average speed and velocity?
1 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"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).