A car travels 12 kilometers due north and then 8.0 kilometers due west in going from town to town . What is the magnitude, in km, of the displacement of a helicopter that flies in a straight line from to ?
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It is 10 km. Use a pencil and a piece of paper to draw the path of the car. You will get a right triangle, then use pythagorean theorem find the magnitude of hypotenuse (one leg is 8 and other is 6)
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