Answer: A person driving her car at 45 km/h approaches an

Chapter 2, Problem 2.87

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A person driving her car at 45 km/h approaches an intersectionjust as the traffic light turns yellow. She knows that theyellow light lasts only 2.0 s before turning to red, and she is28 m away from the near side of the intersection (Fig. 2-51).Should she try to stop, or should she speed up to cross theintersection before the light turns red? The intersection is15 m wide. Her cars maximum deceleration is -5.8 m/s2,whereas it can accelerate from 45 km/h to 65 km/h in 6.0 s.Ignore the length of her car and her reaction time.

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