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A Car Is Traveling at 120 Km/h (75 Mph)

question 66

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A car is traveling at 120 km/h (75 mph) .When applied the braking system can stop the car with a deceleration rate of 9.0 m/s2.The typical reaction time for an alert driver is 0.5 s versus 2 s for a sleepy driver.Assuming a typical car length of 5 m,calculate the number of additional car lengths it takes the sleepy driver to stop compared to the alert driver.


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