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2. A car is 2.0 km west of a traffic light at t = 0 and 5.0 km
east of the light at t = 6.0 min. Assume the origin of the
coordinate system is the light and the positive x direction is
eastward. (a) What are the car's position vectors at these two
times? (b) What is the car's displacement between 0 min and
6.0 min?

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