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?Her average speed is 8.0 km/h, but there is not enough information to determine her average velocity.Her average speed is 8.0 km/h, and her average velocity is 8.0 km/h.Her average speed is 8.0 km/h, and her average velocity is 0 km/h.
