QUESTION 3 Night-time conditions prevail on a highway. A vehicle is driving at a speed of 87 mph when it notices an object located 1000 ft away. The vehicle Immediately hits the brake. Assuming a perception reaction time of 3.4 seconds (larger due to night time), calculate the distance moved by the vehicle between seeing the object and hitting the brakes. Report your answer correct to two decimal places in "feet" units. QUESTION 4 ▸ A driver with 20/15 vision can read a given sign at a distance of 24 ft from the sign. Calculate the maximum distance at which driver with 20/20 visual acuity will be able to see the same sign? (Report your answer to one digit after the decimal)
QUESTION 3 Night-time conditions prevail on a highway. A vehicle is driving at a speed of 87 mph when it notices an object located 1000 ft away. The vehicle Immediately hits the brake. Assuming a perception reaction time of 3.4 seconds (larger due to night time), calculate the distance moved by the vehicle between seeing the object and hitting the brakes. Report your answer correct to two decimal places in "feet" units. QUESTION 4 ▸ A driver with 20/15 vision can read a given sign at a distance of 24 ft from the sign. Calculate the maximum distance at which driver with 20/20 visual acuity will be able to see the same sign? (Report your answer to one digit after the decimal)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:QUESTION 3
Night-time conditions prevail on a highway. A vehicle is driving at a speed of 87 mph when it notices an object located 1000 ft away. The vehicle Immediately hits the brake.
Assuming a perception reaction time of 3.4 seconds (larger due to night time), calculate the distance moved by the vehicle between seeing the object and hitting the brakes.
Report your answer correct to two decimal places in "feet" units.
QUESTION 4
A driver with 20/15 vision can read a given sign at a distance of 24 ft from the sign. Calculate the maximum distance at which driver with 20/20 visual acuity will be able to
see the same sign? (Report your answer to one digit after the decimal)
Expert Solution
Step 1: Given question
Q-1:
Vehicle speed (v) = 87 mph = 127.6 feet/sec
The object is located at 1000 feet away.
Driver reaction time = 3.4 secs
We have to find out the distance moved by the vehicle between seeing the object and hitting the brakes.
Q-2:
A driver with 20/15 vision can read a given sign at a distance of 24 feet away from the sign.
We have to calculate the maximum distance at which driver with 20/20 visual activity will be able to see the same sign.
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