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Answer to Question #36085 in Mechanics | Relativity for alzahra

Question #36085
A jogger runs along a straight and level road for a distance of 8.0 km and then runs back to her starting point. The time for this roundtrip is 2.0 h. Which one of the following is true?
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Assignment Expert
08.11.13, 10:25

As we know, average velocity=displacement\total time.
The jogger returned to the starting point so the displacement is 0. Therefore
average velocity=0\2=0
Total average speed = Total distance/Total time=(8+8)/2=8 km/h

14.10.13, 18:53

Her average speed is 8.0 km/h, and her average velocity is 0 km/h.

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