a) A driver has a reaction timeof 0.50s, and the maximum deceleration of her car
ID: 1760756 • Letter: A
Question
a) A driver has a reaction timeof 0.50s, and the maximum deceleration of her car is 6.0m/s2. She is driving at 20 m/s when suddenly she sees anobstacle in the road 50m in front of her. Can she stop the car intime to avoid a collision? b) In assessing your solutionto this problem, please comment on what this problem tells youabout safe driving habits. Please provide your input guys, it'd bereally appreciate to see the step-by-step method for part a andyour reasoning for part b of the question. Thanksagain! a) A driver has a reaction timeof 0.50s, and the maximum deceleration of her car is 6.0m/s2. She is driving at 20 m/s when suddenly she sees anobstacle in the road 50m in front of her. Can she stop the car intime to avoid a collision? b) In assessing your solutionto this problem, please comment on what this problem tells youabout safe driving habits. Please provide your input guys, it'd bereally appreciate to see the step-by-step method for part a andyour reasoning for part b of the question. Thanksagain! b) In assessing your solutionto this problem, please comment on what this problem tells youabout safe driving habits. Please provide your input guys, it'd bereally appreciate to see the step-by-step method for part a andyour reasoning for part b of the question. Thanksagain!Explanation / Answer
a) after the reaction of 0.50s, the distance to stop is: 50m - 0.50*20m/s = 40m let the distance to stop is d vf2 - vi2 =2ad d = (vf2-vi2)/2a =(0-(20m/s)2)/(2*6.0m/s2) = 33.33m she only need 33.33m to stop but get 40m, so she can stop thecar in time to avoid a collision b) when you observed any situation, stop as soon as possible. ifshe spend another 0.5s to react she will only get 50m-1.0s*20 = 30m to stop, that will notenough to avoid collision. it is better to stop imeediately when you need.Related Questions
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