# 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?

Expert's answer

Unfortunately, the statement of your question is a bit confusing.

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## Comments

Assignment Expert08.11.13, 10:25As 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

eman14.10.13, 18:53Her average speed is 8.0 km/h, and her average velocity is 0 km/h.

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