Question
In: Physics
As a city planner, you receive complaints from local residents about the safety of nearby roads...
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 0.842 and 0.941 , whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.550 and 0.754 . Vehicles of all types travel on the road, from small cars with a mass of 627 kg to large trucks with a mass of 4271 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. maximum: _____m minimum: _____m Given that the goal is to allow all vehicles to come safely to a stop before reaching the intersection, calculate the maximum desired speed limit. maximum speed limit: ____km/h
Solutions
genius_generous answered 1 year agoRelated Solutions
As a city planner, you receive complaints from local residents about the safety of nearby roads...
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 (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 ft. Since fog is a common occurrence...
As a city planner, you receive complaints from local residents about the safety of nearby roads...
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 (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...
As a city planner, you receive complaints from local residents about the safety of nearby roads...
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 (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 ft. Since fog is a common occurrence...
As a city planner, you receive complaints from local residents about the safety of nearby roads...
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 (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 ft. Since fog is a common occurrence...
As a city planner, you receive complaints from local residents about the safety of nearby roads...
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 (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 ft. Since fog is a common occurrence...
You have just been hired as a community health program planner by a local city. The...
You have just been hired as a community health program
planner by a local city. The city has noticed that childhood
obesity rates have been steadily increasing and would like you to
develop programs to help decrease childhood obesity in the city.
You notice that the city does not have physical activity programs.
Which model/framework would you use to develop such a program?
Explain your answer.
The City Council wants to gather input from residents about the recreational opportunities in the city....
The City Council wants to gather input from residents about the
recreational opportunities in the city. Categorize each technique
as simple random sample, stratified sample, systematic sample,
cluster sample, or convenience sample.
a) Get an alphabetical list of all residents and question every
250th resident on the list.
b) Have 10 volunteers go downtown on Saturday afternoon and
question people that they see. The volunteers may quit when they
have questioned 25 people.
c) Get an alphabetical list of all...
Assume you work for OSHA (Occupational Safety and Health Administration) and have complaints about noise levels...
Assume you work for OSHA (Occupational Safety and Health
Administration) and have complaints about noise levels from some of
the workers at a state power plant. You charge the power plant with
taking decibel readings at 2 different areas of the plant at
different times of the day and week. The results of the data
collection are listed. The safe hearing
level is approximately 120 decibels
Area1
Area 2
30
59
12
63
35
81
65
110
24
65
59...
2. The Guyana Water Inc. has received hundreds of complaints from residents of several villages in...
2. The Guyana Water Inc. has received hundreds of complaints
from residents of several villages in East and West Canje,
concerning the quality of water delivered to them. GWI wishes to
ascertain (a) the veracity of claims made in the complaints, (b)
the possible reasons for the problems highlighted and (c) possible
solutions to identified problems. For these purposes, management
has decided to undertake a survey.
(a) Choose an appropriate sampling method and justify your
choice.
(b) State the objectives...
The City of Atlantis provides transit services for residents throughout the city. Suppose you are assigned...
The City of Atlantis provides transit services for residents
throughout the city. Suppose you are assigned to determine transit
ticket prices for the government of the City of Atlantis. How do
you decide on the optimal ticket prices so that the city can
provide an efficient level of transit services?
Explain.
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