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Bob is walking along an abandoned railroad track. He starts walking when his position is r = 3.45 m and undergoes a displacement of Ar = -10.2 mî. What is his final position?

Bob is walking along an abandoned railroad track. He starts walking when his position is r = 3.45 m and undergoes a displacement of Ar = -10.2 mî. What is his final position?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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1) Bob is walking along an abandoned railroad track. He starts walking when his position is r 3.45 mâ, and undergoes a displacement of Ar = -10.2m£. What is his final position? 2) Bob is driving in his car, accelerating at a rate of 3.21 m/s². After 2.65 s he is traveling at 15.1 m/s. a) What is his initial velocity? b) How far has he traveled in that time? 3) Dr. Smeevenstein's minions have been ordered to reconstruct the elevator in Smeevenco headquarters, as it is very important that science is moved form the basement test chambers to the production floor as efficiently as possible. The safety code dictates that the elevator cannot accelerate or decelerate any faster than 2.73 m/s², and cannot travel any faster than 15.0 m/s. The total distance that must be traveled is 373 m. a) What is the shortest time that the elevator can take from the bottom to the top? 4) Jane is hang-gliding, flying northward at 12.0 m/s. Suddenly, a gust of wind blows to the east, acceler- ating the glider (and Jane!) for awind = 0.400 m/s². The wind gust lasts for 4 seconds. a) What is the magnitude and direction of Jane's displacement over these four seconds? PDF
Transcribed Image Text:1) Bob is walking along an abandoned railroad track. He starts walking when his position is r 3.45 mâ, and undergoes a displacement of Ar = -10.2m£. What is his final position? 2) Bob is driving in his car, accelerating at a rate of 3.21 m/s². After 2.65 s he is traveling at 15.1 m/s. a) What is his initial velocity? b) How far has he traveled in that time? 3) Dr. Smeevenstein's minions have been ordered to reconstruct the elevator in Smeevenco headquarters, as it is very important that science is moved form the basement test chambers to the production floor as efficiently as possible. The safety code dictates that the elevator cannot accelerate or decelerate any faster than 2.73 m/s², and cannot travel any faster than 15.0 m/s. The total distance that must be traveled is 373 m. a) What is the shortest time that the elevator can take from the bottom to the top? 4) Jane is hang-gliding, flying northward at 12.0 m/s. Suddenly, a gust of wind blows to the east, acceler- ating the glider (and Jane!) for awind = 0.400 m/s². The wind gust lasts for 4 seconds. a) What is the magnitude and direction of Jane's displacement over these four seconds? PDF
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