1. When the forward speed of the truck shown was 28.5 ft/s, the brakes were suddenly applied, causing all four wheels to stop rotating. It was observed that the truck skidded to rest in 19 ft. Determine the magnitude of the normal reaction and of the friction force at each wheel as the truck skidded to rest. G: 4 ft A- 5 ft 7 ft B

1. When the forward speed of the truck shown was 28.5 ft/s, the brakes were suddenly applied, causing all four wheels to stop rotating. It was observed that the truck skidded to rest in 19 ft. Determine the magnitude of the normal reaction and of the friction force at each wheel as the truck skidded to rest. G: 4 ft A- 5 ft 7 ft B

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

A 2500-lb passenger vehicle originally traveling on a straight and level road gets onto a section of the road with a horizontal curve of radius = 850 ft. If the vehicle was originally traveling at 55 mi/h, determine (a) the additional horsepower on the curve the vehicle must produce to maintain the original speed, (b) the total resistance force on the vehicle as it traverses the horizontal curve, and (c) the total horsepower. Assume that the vehicle is traveling at sea level and has a front cross-sectional area of 30 ft2. Show your solutions and answers.
Situation 4: For the first three items, consider the following: A car having a weight of 40 KN is moving at a certain speed around the curve. Assuming no lateral pressure between the tire and pavement and considering a centrifugal ratio of 0.30. 52. If the degree of curve is 4° determine the maximum speed that the car could move around the curve. a. 104.53 kph b. 193.16 kph C. 162.24 kph d. 240.41 kph 53. Compute the angle of embankment to be provided for this speed if the skid resistance is 0.12. a. 10.21 b. 12.01 C. 21.10 d. 11.20
A driver is driving at 75 kph when a dog suddenly appeared and stopped at the middle of the road. Determine the distance the vehicle would move before the driver could activate the brakes. Assume PRT is 2.50 secs. If the friction factor is 0.30 and brake efficiency is 45%, determine the braking distance. If the vehicle is 250 m away when the driver sees the dog, will the dog be hit by the vehicle?
Each tire on the 1425-kg car can support a maximum friction force parallel to the road surface of 2170 N. This force limit is nearly constant over all possible rectilinear and curvilinear car motions and is attainable only if the car does not skid. Under this maximum braking, determine the total stopping distance s if the brakes are first applied at point A when the car speed is 18 m/s and if the car follows the centerline of the road.
A 2500-lb passenger vehicle originally traveling on a straight and level road gets onto a section of the road with a horizontal curve of radius = 850 ft. If the vehicle was originally traveling at 55 mi/h, determine (a) the additional horsepower on the curve the vehicle must produce to maintain the original speed, (b) the total resistance force on the vehicle as it traverses the horizontal curve, and (c) the total horsepower. Assume that the vehicle is traveling at sea level and has a front cross-sectional area of 30 ft2. Show your step by step solutions.
A car traveling at 45 mph on a poor, wet pavement has a braking efficiency of 87%. The brakes were applied 100 feet before hitting an obstacle in the road. The road is uphill for 40 feet and then is level for the remainder of the way. The car had a maximum coefficient of road adhesion in the sloped portion of the poor, wet roadway and but as soon as it started going on the level portion its coefficient of road adhesion reduced to 0.3. Assuming that the car struck the obstacle at 30 mph, what was the grade of the hill? Assume practical stopping distance equation applies.
III. Determine the horsepower produced by a passenger car travelling at a speed of 68 mi/hr on a radius of curvature of 1,200 ft road of 4% grade with a smooth pavement. Assume the weight of the car is 4500 lb and the cross sectional area of the car is 45 ft².
The radius of a highway curve is 120 m, and has an angle of 9.31° from the horizontal. The center of gravity of the car is located 0.80 m above the roadway and the distance between the two front wheels is 1.2 m. If the car has a total weight of 15 KN. a. Determine the normal acceleration and the velocity (in kph) of the car before overturning. b. Find the maximum velocity of the car could move along the curve so that there will be no outstanding pressure between the tires and the roadway. c. If the coefficient of kinetic friction is 0.60, what is the maximum velocity (in kph) of the car without sliding.
Need within 1hr please, thanks A 0.5 kg block slides on a circular road with a radius of 4 m in the vertical plane. Block speed is 4m/s as it passes point A and 5 m/s passes point B. Angle distance from point A and B is 30 along the radius. Determine normal force exerted on block by the surface at point A and B and the total acceleration at Point B.
Problem #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.