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A) 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 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 1410 lb to large trucks weighing 8280 lb. 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.
B) 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.
Two parallel metal plates separated by a distance of 2mm and each having an area of .5m squared carry equal, What potential difference exist between the plates
An arrow is aimed horizontally at the center of a target that is 23 m away. if the arrow leaves the bow horizontally with speed of 87 m/s.
A ball is thrown vertically upward and then comes back down. Describe the behavior of the ball's velocity and acceleration
Suppose 2100 J of heat are added to 3.3 mol of argon gas at a constant pressure of 120 kPa. (Assume that the argon can be treated as an ideal monatomic gas.)
If the elastic limit of steel is 5.0 multiplied by 108 Pa, decide the minimum diameter a steel wire can have if it is to support a 66-kg circus performer without its elastic limit being surpassed.
A ball thrown horizontally at 20 m/s travels a horizontal distance of 52 meter before hitting the ground. Determine from what height was the ball thrown
IN A VEEERTICAL JUMP AND REACH TEST A 60 KKG SSSTUDENT JUMPS 60CM, WHILE A 90 KG STUDENT JUMPS 45 CM. WHICH JUMPEER WAS MORE POWEERFUL
A pedestrain bridge consists of a walkway of mass 1000kg and length 10.0m supported at each end by brackets. Two people, each of mass 80kg, are walking across the bridge.
1. what is the angular separation of two spectral lines of wavelengths 440 nm and 388 nm formed in order m2 with a 382
An proton (m = 1.67 ´ 10-27 kg and q = 1.6 ´ 10-19 C) travelling at 2.7 × 105 ms-1 enters a magnetic field of 1.2 T at right angles to the direction of motion of the electron. What is the centripetal force on proton.
A paper filled, parallel plate capacitor has a charge of 12uC and a potential dissimilarity of 24V across the plates. What is the capacitance C?
Two spherical shells have a common center. A -1.00x10-6 C charge is spread uniformly over the inner shell,which has a radius of 0.050 m. A +5.00 x10-6 C charge isspread uniformly over the outer shell, which has a radius of 0.15m.
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