Principles of Highway Engineering and Traffic Analysi (NEW!!)
6th Edition
ISBN: 9781119305026
Author: Fred L. Mannering, Scott S. Washburn
Publisher: WILEY
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Chapter 2, Problem 22P
To determine
The speed of the car when it strikes the object.
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A civil engineer's preliminary design for a freeway off-ramp is circular with radius R = 75m. What is the maximum speed (kph) at which vehicles will reach the ramp without losing traction of he believes that the coefficient of static friction between tires and road is least 0.35?
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Chapter 2 Solutions
Principles of Highway Engineering and Traffic Analysi (NEW!!)
Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 23PCh. 2 - Prob. 24PCh. 2 - Prob. 25PCh. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37PCh. 2 - Prob. 38PCh. 2 - Prob. 39PCh. 2 - Prob. 40P
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- please solve correctarrow_forwardQuestion-- A vehicle is moving on a road of grade +4% at a speed of 20 m/s. Consider the coefficient of rolling friction as 0.46 and acceleration due to gravity as 10 m/s². On applying brakes to reach a speed of 10 m/s, find the required braking distance along the horizontal.arrow_forwardThe car is moving with a speed vo = 46 mi/hr up the 8-percent grade, and the driver applies the brakes at point A, causing all wheels to skid. The coefficient of kinetic friction for the rain-slicked road is lk = 0.61. Determine the stopping distance sĄB. Repeat your calculations for the case when the car is moving downhill from B to A. в 8 100 Answers: Uphill: SAB = ft Downhill: SBA i ftarrow_forward
- X Incorrect 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 = -8.940 ft/sec2arrow_forwardCurrent 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?arrow_forwardA moving car is traveling at 80 kph when the brakes are applied to it. The car stillmoves at a distance of 35 m, before it completely stops. Determine the coefficientof friction between the tires and the road surface.arrow_forward
- 1. A driver is travelling at 50 mph is 80 m from a wall ahead, if the driver applies the brake immediately at t-2 secs, and begins slowing down at 10m/s^2. a. Find the distance from the stopping point to the wall. b. Determine the braking time or the time during deceleration. c. Determine the average skid resistance, assuming brake efficiency of 70%.arrow_forwardThe angular displacement of the centrifuge is given by θ = 3.4[t + 29e-0.040t - 29] rad, where t is in seconds and t = 0 is the startup time. If the person loses consciousness at an acceleration level of 8.9g, determine the time t at which this would occur. Verify that the tangential acceleration is negligible as the normal acceleration approaches 8.9g.arrow_forwardA vehicle weighing a 50 kN is moving at a constant speed around a circular curve. Neglecting the friction between the tires and the pavement and the centrifugal ratio (the ratio of the centrifugal force experience by the vehicle on the curve to its own weight) is 0.30. The degree of the curve is 5 degrees.a. Calculate the centrifugal force.b. Calculate the maximum speed the vehicle could move around the curve (in kph)c. If the skid resistance is 0.15, calculate the maximum super elevation that can be provided for the speed calculated from b.arrow_forward
- * Incorrect 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 = 15.82 ft/sec?arrow_forwardProblem #4 (. A 16-lb bowling ball is cast horizontally onto a lane such that its initial angular rate wo = 0 and its center of mass has a velocity vo = 8 ft/s. The radius of the ball is r = 0.375 ft, and the coefficient of kinetic friction between the lane and ball is Hk = 0.12. 8 ft/s G What is the condition, in terms of w and v for а. 0.375 ft rolling without slipping? b. ) Draw a clear and complete free body diagram of just the ball. с. What is the angular acceleration of the ball? Use IG = l5 mr for a solid sphere. What is the linear acceleration of the ball? е. For how much time does the ball slide before it begins to roll without slip? f. For what distance does the ball slide before it begins to roll without slip? g. What is the velocity of the ball at the moment it beings to roll without slip? d.arrow_forwardSituation 3. A road having a radius of 120m and has angle of 9.31 degrees from the horizontal. The center of gravity of the car is located 0.80m above the roadway and the distance between the two front wheels is 1.20m. If the car has a total weight of 15 KN, a. Compute the normal acceleration and the velocity of the car before overturning. b. If uk= 0.60, what is the velocity of the car without sliding? Please answer this with a complete solution and with a Free Body Diagram PLEASE. Thank you.arrow_forward
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