An automobile is traveling on a long, straight high-way at a steady 75.0 mi/h when the driver sees a wreck 150 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and the wreck are two different surfaces. First there is 100 m of ice, where the deceleration is only 1.00 m/s2. From then on, it is dry concrete, where the deceleration is a more normal 7.00 m/s2.
(a) What was the car’s speed just after leaving the icy portion of the road?
(b) What is the total distance her car travels before it comes to a stop?
(c) What is the total time it took the car to stop?

  • CreatedAugust 29, 2015
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