An automobile is traveling on a long, straight highway at a steady 75.0 m/h when the...
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An automobile is traveling on a long, straight highway at asteady 75.0 m/h when the driver sees a wreck 170 m ahead. At thatinstant, she applies the brakes (ignore reaction time). Between herand the wreck are two different surfaces. First there is 140 m ofice, where the deceleration is only 1.20 m/s^2 . From then on, itis dry concrete, where the deceleration is a more normal 7.90 m/s^2. What was the car’s speed just after leaving the icy portion ofthe road? What is the total distance her car travels before itcomes to a stop? What is the total time it took the car tostop?
An automobile is traveling on a long, straight highway at asteady 75.0 m/h when the driver sees a wreck 170 m ahead. At thatinstant, she applies the brakes (ignore reaction time). Between herand the wreck are two different surfaces. First there is 140 m ofice, where the deceleration is only 1.20 m/s^2 . From then on, itis dry concrete, where the deceleration is a more normal 7.90 m/s^2. What was the car’s speed just after leaving the icy portion ofthe road? What is the total distance her car travels before itcomes to a stop? What is the total time it took the car tostop?
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