A cross-country skier is skiing across a level snow-covered field. She first skies half a mile west, turns and skies one mile northeast (45° north of west), and then skies and additional two miles northeast (45° north of east). What is her net displacement (direction and magnitude) from her starting position? What average velocity would she need to have to return (in a straight line) to her starting position in fifteen minutes?
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Answer:
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Explanation:
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