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oy Name Kenneth Beutler AEZ220 Fall 2012 Quiz 2 The length of this quiz is 25 minutes. ~ e i HONOR CODE FOR THIS QUIZ: This quiz is closed book, closed notes, no calculator. By signing. the statement below, you are agreeing that you have not received or given any help on this exam, either by sharing or discussing the contents of the exam during the exam period or by having access to any form of written or oral aid during the exam. By signing this statement, you acknowledge that the violation of this statement constitutes academic dishonesty and will be reported fo the GIT Administration for disciplinary action. I have abided by the Honor Code as delineated above: Fim, Buten. (readable signature) Use pencil AND an craser. All work should be included on the FRONT of this sheet; use the back for scratch calculations. The final answers should be boxed or circled. Consider the helicopter cargo delivery system below. The light pulley has negligible friction and the wire connecting the 50 N cargo with the 100 N counterweight is inextensible and negligible mass. The coefficient of friction can be assumed to be 0.1. Round g,_ |g, if needed, to the nearest integer value for ease in computations. 100 N countel counterweight a) Sketch the free body diagram(s) of the system. b) What is the acceleration of the cargo? 50 N cargo . ce =T She To femy 2 myth me 18 DF amey #507 =T ‘ Shs 1 50 samgy 7 —M2y mar > ” a Caysma y = 587 fee) c} How long does it take the 50 N cargo to be lowered 12 m? : y = vir t Zz ~dat * “4 1% ve 123 + 2-12 Mm —— me x -2 2 L2,3 = 92 +% [fe 3 secandlS\ Qt oe ft 4 a d) Using the work- kinetic energy, find the speed of a care and counterweight when the cargo has dropped 6 m? ; =Chy-he) = : -~ 2m ( ms JG) Om “hy Ne it& am [4% ah : Om eS (5) (10) (e-o) — at (4) = 20) (v.) uz = 1g 300 ~10> EM 
