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Now, suppose a car travels 90. meters due north in 15 seconds. Then the car turns around and travels 40. meters due south in 5.0 seconds. What is the magnitude of the average velocity of the car during this 20.-second interval?

 May 28, 2020
 #1
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This question is rather vague

 

The car travels a total   130 m in 20seconds     = 6.5 m/s   OVERALL

 

As far as it's DISPLACEMENT is concerned , it is   90 - 40 meters from the starting point = 50 meters   in 20 s = 2.5 m/s  NET

 May 28, 2020
 #2
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So the average speed is  6.5m/s  and the average velocity is 2.5m/s

Alan  May 28, 2020
edited by Alan  May 28, 2020

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