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ID: 2137357 • Letter: A
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As a city by Text-Enhance" id="_GPLITA_0" href="http://www.chegg.com/s/_widget/tiny_mce/#" in_rurl="http://i.txtsrving.info/click?v=VVM6NDI3MTM6MTg6cGxhbm5lcjoyNDczZWNjM2JjZWUyYjEwMzJmYzM2MDVkMTExNWE4ZTp6LTEwNDEtMTA3NTUzOnd3dy5zYXBsaW5nbGVhcm5pbmcuY29tOjU2MzkzOmFjMDZhYzQ3ZjdiODQ2ODE2YTAzMjFhMmQ4NjU5ZWIyOjllMjRkOGUyZDQ4YzRlYmVhY2JlZTUxOWMwMGRjY2I1" 91c4="1" in_hdr="">planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (55 mph) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 155 feet. Since fog is a common occurrence in this region, you decide to investigate. The state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0.689 and 0.770, whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.450 and 0.617. Vehicles of all types travel on the road, from small VW bugs weighing 1090 lb to large trucks weighing 7740 lb. Considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the miminim and maximum braking distance needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection.
Also, Which of the following affects the soundness of your decision?
a) precipitation from fog can lower the coefficient of friction
b) Newton's second law does not apply to his situation
c) drivers cannot be expected to obey the speed limit
d) reaction time of the drivers is not taken into effect
Explanation / Answer
sorry i thought it is the correct ans..!
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