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i Chrome File Edit View History Bookmarks People Window Help 52 33% D Fri 10:01 AM us. WileyPLUS Ahmad > d Secure! https://edugen.wileyplus.com/edugen/student/mainfr.uni : Apps V WileyPLUSDifferential calculus Ish University of South D Apple iCloud Yahoo D Bing W Wikipedia Facebook y Twitter LinkedIn Other Bookmarks n Shot WileyPLUS Haliday, Fundamentals of Physics, 10e 9.28 PM Calculus-based Physics I ⅈ (PH 201-202) Home Read, Study& Practice Gradebook ORION Downloadable eTextbook Assianment > Open Assignment FULL SCREEN PRINTER VERSION BACK NEXT odf ASSIGNMENT RESOURCES Chapter 08, Problem 050 201-11 A 56 kg skier leaves the end of a ski-jump ramp with a velocity of 25 m/s directed 26° above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed or 20 mý's, landing 17 m vertically below the end or the ramp. From the launch to the retum to the ground, by how much is the mechanical energy of the skier-Earth system reduced because of air drag? 033 n Shot 11.56 PM 040 Number Units 054 the tolerance is +/2% n Shot 8.32 PM Obiective LINK TO TEXT n Shot 8.36 PM Question Attempts: 0 of 3 usedSAVE POR LATER SUBMIT ANSWER n Shot 47.15 PM n Shot 1.23 AM All Rights Reserved. A Division of John Wiley &Sons;, Ins. Version 4.24.1.23 6,409 29

Explanation / Answer

here,

initial velocity of the skier , u = 25 m/s

final speed of skier , v = 20 m/s

h = 17 m

the energy reduced due to air drag , E = initial total energy - final total energy

E = 0.5 * m * u^2 + m * g * h - 0.5 * m * v^2 J

E = 56 * ( 0.5 * 25^2 + 9.81 * 17 - 0.5 * 20^2) J

E = 1.57 * 10^4 J

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