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UOUKnarks Tools Window Help LUS httped gen.wileyplus.com/edugen/student/mainfr.uni S Halliday, Fundamentals of Physics, 10e ENGINEERING PHYSICS SEQUENCE Practice Gradebook ORION Downloadable eTextbook signment FULL SCREEN PRINTER VERSION B CES Chapter 03, Problem 025 Oasis walks 31 km due north. If it is to then walk directly to B, (a) how far and (b) in what direction (relative to the positive x-axis within the range (-180°, 180°]) should it walk? B is 10 km due east of oasis A. Starting from oasis A, a camel walks 23 km in a direction 15.0° south of east and then A d B em iem (a) Number Units (b) Number Units biem blem GO TUTORIAL oblem LDIK TO SAMPLE PROBLEM uNk TO SAPLE PROBLEM VDEO MINI-LECTURE LINK TO TEXT LINK TO SAMPLE PROBLEM SAVE FOR LATER Question Attempts: 0 of 4 used by StudyExplanation / Answer
here
the displacement of oasis B , sB = 10 km i
dispalcement 1 , s1 = 23 * ( cos(15) i - sin(15) j)
s1 = 22.2 i km - 5.95 j km
displacement 2 , s2 = 31 j km
the third displacement required , s = sB - s1 - s2
s = 10 km i - ( 22.2 i km - 5.95 j km) - 31 j km
s = - 12.2 i km - 25.05 j km
a)
the magnitude of displacement , |s| = sqrt(12.2^2 + 25.05^2)
|s| = 27.9 km
b)
the direction of displacement , theta = arctan((- 25.05)/(-12.2)) = - 115.96 degree from +x axis
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