# Question

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?

(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?

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