A car was traveling at a speed of 80 kph. The driver saw a roadblock 80 m. ahead and stopped on the brake causing the car to decelerate uniformly at 10 m/sec2. Assuming perception- reaction time is 2 sec, determine the distance from the roadblock to the point where the car will stop in meters. Select one: O a. 9.71 m O b. 10.87 m O c. 11.34 m O d. 12.62 m

A car was traveling at a speed of 80 kph. The driver saw a roadblock 80 m. ahead and stopped on the brake causing the car to decelerate uniformly at 10 m/sec2. Assuming perception- reaction time is 2 sec, determine the distance from the roadblock to the point where the car will stop in meters. Select one: O a. 9.71 m O b. 10.87 m O c. 11.34 m O d. 12.62 m

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

3) A vehicle is moving at 50 mph and suddenly sees an object. It applies the brakes and slows down to a speed of 15 mph. Calculate the following: a. Distance the vehicle would move before driver activates the brakes. (Use design PIEV time of 2.5 seconds) b. distance the vehicle moved after application of brakes to drop to 15 mph speed (assume constant Ideceleration rate of 11.2 ft/sec²)
The driver of a vehicle is following another vehicle in front of her on a two-lane highway at night. She keeps a clearance of one car length for every 4 mph of speed while she follows the lead car. However, while going downhill at 56 mph, the lead car crashes into the rear of an unlighted abandoned truck. At what speed will her car hit the wreckage? Assume a perception-reaction time is 2 seconds, a deceleration rate of 11.2 feet/sec2, the length of cars of 18 feet, and the road grade as 3%.
Q2/A car driver travelling at a constant velocity of 30 Km/br, sees a man walking across the road (32 m) ahead. The driver's reaction time is 0.2 sec, and the brakes are capable of production a deceleration of 1.2 m/sec?, Calculate the distance from where the car stops to CIOssing. where the man is (30 Degree)
The reaction time of the average automobile driver is about 0.7sec. The reaction time is the interval between the perception of a signal to stop and the application of the brakes. If an automobile can decelerate at 4.5 m/sec?, compute the total distance covered in coming to stop after a signal is observed from an initial velocity of 48kph.
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^2 . 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 19 ft/s^2. Determine the minimum distance d between the cars so as to avoid a collision.
Car A is traveling at a constant speed vA = 132 km/h at a location where the speed limit is 100 km/h. The police officer in car Pobserves this speed via radar. At the moment when A passes P, the police car begins to accelerate at the constant rate of 4.1 m/s² until a speed of 169 km/h is achieved, and that speed is then maintained. Determine the distance s required for the police officer to overtake car A. Neglect any nonrectilinear motion of P. VA Answer:s= m
Q2/ driver moving at speed of 43.8 mi/h with average acceleration = 1.43 he decides to pass the car on the right lane , the initial time for maneuver = 4 sec and the time of the passing vehicle is traveling in left lane =10 sec . determine the required distance to pass the vehicle ?
A car is traveling at 15 m/s, when the traffic light 60 m ahead turns yellow. If the car decelerates, the time needed to stop the car at the light. 7 secs O 8 secs 5 secs 6 secs
A driver noticed a road block while travelling at 40mph. He applied the brakes causing the car to decelerate uniformly at 6m/s2. The car stopped 12m from the road block. How far was the block when the driver saw it fırst assuming a perception time of 3s. Correct! O 92.40 m 92.4 26.67 m 53.67 m 27.0 m
Car A is traveling at a location where the speed limit is 100 km/h. The police officer in car P observes this speed via radar. The driver of car A is traveling at vÃ = 122 km/h as it passes P, but over the next 4.1 seconds, the car uniformly decelerates to the speed limit of 100 km/h, and after that the speed limit is maintained. At the moment when A passes P, the police car begins to accelerate at the constant rate of 4.0 m/s² until a speed of 164 km/h is achieved, and that speed is then maintained. Determine the distance s required for the police officer to overtake car A. Answer: s= i VA 248.52 P m
The velocities of commuter trains A and B are as shown. Knowing that the speed of each train is constant and that B reaches the crossing 3 min after A passed through the same crossing, determine the distance between the fronts of the engines 10 min after A passed through the crossing (Answer in whole number of a meter).
Calculate the passing sight distance on a two lane road having the design speed of 86 kmph and reaction time 2 sec. Assume one way traffic. Take acceleration of overtaking and overtaken vehicle as 3 m/s2 and 1.5 m/s2 respectively. Assume that overtaken vehicle starts accelerating after the reaction time of overtaking vehicle. Take space headway as 18 m.