If the design speed is 80 kmph, perception reaction time 3 seconds and coefficient of friction 0.5, the safe stopping sight distance is...
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- Given: Radar indicates vehicle speed = 100 MPH Vrs = 100 MPH, β = 60 degrees V1 = Vehicle’s Actual Speed What is the vehicle’s actual speed? Vrs = V1 (cos β) = V1 (cosine error)What does the approach velocity signify in the Rose equation and the Carmen Kozney equation used to calculated the head loss?Compute the total stopping sight distance (in feet) that a car moves during an emergency stop based on the following data: A. Initial velocity of car = 35 MPH B. Final velocity when it stops after 6 seconds = 0 KPH C. Slope of roadway = 2% (downhill) D. Perception-reaction time = 0.80 seconds
- For a total reaction time of 2.5s, coefficient of friction 0.35, design speed 80kph, what is the stopping sight distance on a highway? a. 127.47m b 199.38m c 71.91m d 58.79m10. A man driving his car 45 Mph suddenly sees an object in the road 60 ft ahead. What constant deceleration in ft/s2 is required to stop the car in this distance?Convert 150kph to mi/hr, m/s and ft/s
- A 450-N is in contact with a level plane of fk = 0.10. If the block is acted upon by a horizontal force of 75N, what time will elapse before the block reaches a velocity of 15m/s, starting from rest?0Figure 3 shows a square plate is constrained within the slots at A and B. When θ = 25°. Point A is moving at va = 12m/s. Determine the velocity point D at this instant and the trajectory of the instantaneous center of zero velocity(IC) when the square plate moves from θ = 25° until θ = 0°. When θ = 0°, determine the velocity of point B and point C if the va = 20m/s. Another case, when θ = 25° and the velocity of point A is increase to 14m/s, does the trajectory of IC change? Justify your answerDetermine the required total passing sight distance for the following: Speed of the passing car = 100 kph; Speed of the overtaken vehicle = 80 kph; Time of initial maneuvers = 5 sec; Time passing vehicle occupies left lane = 10 secs; Distance between the passing car and opposing car at the end of maneuver = 20 m; Average acceleration = 2.5 kph/sec. a. 502.75 m b. 602.75 m c. 702.75 m d. 402.75 m
- An object travels from the origin along a curved path y=5x2/3. If its horizontal velocity is Vx=24t2 m/sec, where t is in seconds, determine the magnitude of its velocity, acceleration and distance from the origin at t=5sec.Meelo uses the airscooter technique to travel in a straight path, his initial velocity is 6m/s when he is subjected to a deceleration of a (-1.5v1/2) m/s^2, where v is in m/s. How much time occurred before Meelo stops?Derive the velocity profile between parallel plates with fluid viscosity and upper plate with velocity Vo.