H.W 2A driver hits a pedestrian trying to cross the street during the daytime. 2 seconds afterseeing the pedestrian, the driver presses the brake. A total of 65 meters of braking track, 50 mbefore and 15 m after the impact point, was measured by the police officer. How many meterswould the driver have to see the pedestrian in order to stop without crashing? (f= 0.6 and s = 0%)50 mA15 mAccident point

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Answered: H.W 2 A driver hits a pedestrian trying…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question An engineer has designed a road with a curve of radius 12 m. The material of the road offers a maximum coefficient of friction of 0.3. What should be the maximum permissible speed limit on this road? C 0 7 m/s 8 m/s 6 m/s 5 m/s
Current Attempt in Progress The 3620-lb car is traveling at 25 mi/hr when the driver applies the brakes, and the car continues to move along the circular path. What is the maximum deceleration possible (a, is negative if the speed is decreasing) if the tires are limited to a total horizontal friction force of 2290 Ib? 105 ft Answer: a= ft/sec?
2. A driver traveling at 70 kph sees a stalled car 30 m ahead. If the driver applies the brakes immediately (perception - reaction time is zero) and begins slowing the vehicle at 8 m/sec2 (emergency deceleration), how far from the stalled car will the car stop to avoid hitting the stalled vehicle? V,=70 kph V,=0 Stalled Car a=-8m/s2 -S- 30-S -30 m-
1.) A truck going uphill on a one lane road with 10% grade has left brake marks of 10.49 m on the pavement to avoid colliding with a car traveling down the road at 100 km/h. Assuming that the vehicles applied breaks at the same time. What minimum distance should be visible to drivers of the vehicles to avoid collision? (take µ= 0.70 and break efficiency n=0.70 for both vehicles, mass factor = 1.04, tr=2.5 seconds) a.) use practical breaking distance b.) use theoretical brake distance
2. The driver of a car, applied brakes and barely avoided. hitting an obstacle on the road. The vehicle left skid marks of tyre on the road for a length of 25 m. There was a speed limit restriction of 55 km/h for that road. (i) If driver was travelling on a level road, was he violating the limit? (Take f = 0.5 and reaction time t = 2.5 s)
Please answer completely with step by step explanation
compute the required SSD for a two-way traffic in a single lane to avoid collision with a car approaching from opposite direction if both cars are moving at 80kph, perception reaction time of each driver is 2 seconds. The coefficient of friction between the tires and the pavement is 0.50. G=2%
Mph is miles per hour. Solve the problem completely. Support your solutions with diagrams. No short-cut in your solution
Note:hand written solution should be avoided.
When a car is travelling at 60kph, after the brakes suddenly applied, the car will still travel 30m before it stops. What is the coefficient of friction between the tires and the road surface? O 0.42 O 0.47 O 0.52 O 0.36
Car B is traveling a distance d ahead of car A. Both cars are traveling at 60 ft/s when the driver of B suddenly applies the brakes, causing his car to decelerate at 12 ft/s . It takes the driver of car A 0.75 s to react (this is the normal reaction time for drivers). When he applies his brakes, he decelerates at 14 ft/s? Part A - (Figure 1) Determine the minimum distance d between the cars so as to avoid a collision. Express your answer to three significant figures and include the appropriate units. HẢ ? Value Units
A driver on a level two-lane highway observes a truck completely blocking the highway. The driver applied the brakes and utilized the maximum longitudinal friction of 0.45 between the wet pavement surfaces and tires. The vehicle stopped only 10 m from the truck. If the driver was driving at 100 km/h, how far was she from the truck when she first observed it (assume perception-reaction time is 1.5 seconds)? How far was she from the truck at the moment the brakes were applied

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