Physics

Problem

A hiker walks 1.2 km north in 0.30 h and then 0.8 km south in 0.20 h along a straight trail. What is the magnitude of her average velocity for the entire trip? a)

2.0\ \text{km/h}

0.8\ \text{km/h}

1.3\ \text{km/h}

4.0\ \text{km/h}

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