Physics, 27.06.2019 03:50 shartman22

As a city 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 ( 89 km/h) 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 47 meters. because 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 cars with a mass of 571 kg to large trucks with a mass of 3991 kg. considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum braking distance needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection.

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As a city planner, you receive complaints from local residents about the safety of nearby roads and...

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