Disturbed by speeding cars outside his workplace, Nobel laureate Arthur Holly Compton designed a speed bump (called the "Holly hump") and had it installed. Suppose a 1800-kg car passes over a hump in a roadway that follows the arc of a circle of radius 20.2 m as in the figure below.(a) If the car travels at 28.4 km/h what force does the road exert on the car as the car passes the highest point of the hump?magnitudedirection---Select--- ·(b) What is the maximum speed the car can have without losing contact with the road as it passes this highest point?km/h

Part (a)Given:- Mass of the car, m=1800kg- Radius of the arc, r=20.2m- Speed of the car,…

Answered: Disturbed by speeding cars outside his…

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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In a certain accident investigation, the traffic enforcer tries to measure the length of the skid marks on the roadway and recorded it to be 36 m. Assuming the coefficient of friction between the roadway and the tires is 0.15 and the road is flat, what was the velocity of the car at the time the brakes were applied?
The perception reaction time for a vehicle travelling at 90 km/h, given the coefficient of longitudinal friction of 0.35 and the stopping sight distance of 170 m (assume g = 9.81 m/s²) is seconds!
A water tank is being towed on an uphill road that makes 14° with the horizontal with a constant acceleration of 3.5 m/s2 in the direction of motion. Determine the angle the free surface of water makes with the horizontal. What would your answer be if the direction of motion were downward on the same road with the same acceleration?
sid c At highway speeds, a particular automobile is capable of an acceleration of about 1.6 m/s2. At this rate, how long would it take to accelerate from 80 km/h to 110 km/h?
As shown in the figure below, a motorist starts from rest at point A on a circular entrance ramp when t = 0, increases the speed of her automobile at a constant rate and enters the highway at point B. Knowing that her speed continues to increase at the same rate until it reaches 80 km/h at point C, determine (a) the speed at point B, (b) the magnitude of the total acceleration when t = 12 s. -100 m → 150 m •A
An automobile A travelling at a constant velocity of 45 ft/s passes a gasoline station. After 2 seconds, another automobile B leaves the gasoline station and accelerates at the constant rate of 6 ft/s2. How long will the second automobile overtakes the first?
The two cars collide at right angles in the intersection of two icy roads. Car A has a mass of 1040 kg and car B has a mass of 1005 kg. The cars become entangled and move off together witha common velocity in the direction indicated. If car A was traveling 44 km/h at the instant of impact, compute the corresponding velocity of car B just before impact. 25 B. A = 44 km/h Answer: VB = i km/h
A 0.6 ton motor is moving on a leveled highway at a speed of 108 km/hr. How large is a retarding force (in Newton) is required ?to stop it in a distance of O.007 km 1654 4886 3860 non of them
1. From a speed of 90 kph, a car accelerates at the rate of 10m/min/sec along a straight road . At the end of 30 seconds. What is the final velocity of the car in m/sec? 2. Determine the distance
Problem 2 A project by some to monitor the traffc safety at a busy intersection. They measwre (with a precision stopwatch) that exactly three seconds after car B passes through the intersection traveling south at vg = 55 mph, minivan A passes through at va = 70 mph on the road that runs at an angle 0 = 60° east of north. The speed of each automobile is Civil Engineering students requires them constant. Determine (a) the relative velocity (in mph) of B with respect to A, draw the vector triangles as part of your answer (b) the change in position (in fi) of B with respect to A during a 10-s interval, (c) the distance (in ft) between the two automobiles 3 s after A has passed through the intersection.
A car is driven around a circular test track of diameter d. Determine: (a) the value of d in meters (report final answer in 3 significant digits) Given: speed of car 79 km/h the normal component of the acceleration is 3.2 m/s? (b) the speed of the car in kph or km/hr (report final answer in 3 significant digits) Given: d = 220 m the normal component of the acceleration is measured to be 0.5g (g = acceleration due to gravity)
A motorcycle starts its motion from an initial speed of 10 km/h and accelerates to100 km/hr in 10 sec. Estimate the motorcycle acceleration, average speed and its distance traveled.

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