10. Person A is 4 km south and 6 km west of person B. Person A walks north at aspeed of 1 km/h. Person B walks east at a speed of 2 km/h. If they both start at12:30:00, determine the closest distance they will ever be from each other.Create a new diagram that will support your opening equation.4 kmA6 kmB

Let d represent the distance between A and B. The distance d at any time t between the two persons…

Answered: 10. Person A is 4 km south and 6 km…

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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A car starts from rest at point A and accelerates at 0.75m/s^2 until it reaches a speed of 9m/s. It then proceeds at 9m/s until the brakes are applied. It comes to rest at point B, 27m beyond the point where the brakes are applied. Knowing that the distance between points A and B is 180m, determine the time required for the car to travel from point A to point B
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.
The vehicle travels over the hill described by y = ( − 1.5 x 10−³ x²) ft. If it has a constant speed of 80 ft/s, determine the y component of the vehicle's velocity when x = 55 ft. O 2.13 ft/s O 10.23 ft/s O 13.02 ft/s O 20.13 ft/s
Normal and Tangential Coordinates 6. A motorist is traveling on a curved section of highway with a radius of 2500 ft at a speed of 60 mi/h. The motorist suddenly applies the brakes, causing the automobile to slow down at a constant rate. If the speed has been reduced to 45 mi/h after 8 s, determine the acceleration of the automobile immediately after the brakes have been applied. VA= 60 mi/h 0 A 2500 ft
a
The car travels around the portion of a circular track having a radius of r = 600 ft such that when it is at point A it has a velocity of 3 ft/s, which is increasing at the rate of 0.002t ft/s?, where t is in seconds. Determine the magnitudes of its velocity and acceleration when it has traveled two-thirds the way around the track. A
A sled traveling down along a curve which can be approximated by the parabola y = % x. When the sled is at point A (XA = 2 m, JA = 1 m), the sled's speed is measured as va= 8 m/s and the increase in speed is dva/dt = 4 m/s?. Determine the magnitude of the sled's acceleration at this instant. y y=x YA
At the instant shown, cars A and B travel at speeds of 70 mi/h and 40 mi/h, respectively. If B is decreasing its speed at 800 mi/h? while A is increasing its speed at 200 ml/h?, Car B moves along a curve having a radius of curvature of 1 km. determine the following (1 mile 1.6 km) 40 Acceleration of B Seet he 4055 mi/h2 5540 mi/h2 2682 mi/h2 8226 mi/h2
The car is traveling at a constant speed through a dip in the road. The radius of curvature of the road at point A, the bottom of the dip is 471m. What speed of the car (kph) would result in an acceleration of magnitude 0.2g when the car is at A? use 3 decimal places
500 is in meters.
Repeat the previous problem, only now the driver of car A is traveling at VA = 130 km/h as it passes P, but over the next 5 seconds, the car uniformly decelerates to the speed limit of 100 km /h, and after that the speed limit is maintained. If the motion of the police car P remains as described in the previous problem, determine the distance required for police officer to overtake car A. Ans. 330 m
Car A starts from rest at t = 0 and travels along a straight road with a constant acceleration of 6 ft/s^2 until it reaches a speed of 80 ft/s. Afterwards it maintains this speed. Also, when t = 0, car B located 6000 ft down the road is traveling towards A at a constant speed of 60 ft/s. Determine the distance traveled by car A when they pass each other.

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