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Assignment 2 Solutions

Assignment 2 Solutions - Assignment 2 Start Date 22 Sep...

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Unformatted text preview: Assignment 2 Start Date: 22 Sep 2008 at 10:00 AM 5 Oct 2003 at 11:00 PM Student Access after Due Date: Yes. 1-.I"iew With Assistance _ Graded: Yes Chapter 4, Problem 34 — A soccer ball is kicked from the ground with an initial speed of 20.3 mfs at an upward angle of 48.2". A player 42.5 m away:r in — the direction of the kick starts running to meet the ball at that instant. What must be his average speed it he is to meet the loall just before it hits the ground? Neglect air resistance. 7 2 L \ 0 : A“ u z i I 0 ’ . . I '1 ’1; All 1 2 ‘ ’ AA r _'A "Ll‘ML 4'0 ’ . 1- __./ 1 A ' ' u A —A AA A‘ 2' L/‘Z( : I r 7- ~ . :- V C. .‘ t. t K — Lila-8’14“” u, , ,_ (10.3 ,1” H ‘ Q n t Chapter 5, Problem 54 In Figure 5-52,. three ballot boxes are connected by cords, one of which wraps over a pulley having negligible friction on its axle and negligible mass. The masses are mg = 33.0 kg, mg = 39.0 kg, and mg = 15.0 kg. IlI'Il'hen the assernbhlr is released from rest, [a] what is the tension in the cord connecting El and C, and [b] how far does A move in the first 0.230 s {assuming it doey‘lqrseach the pulley)? T Q") l ls . ”Kn.“ (I M. + '1' WI =- "u u + ( u. u + A 1— u , =’M c. + I m l i“ t m + 1.43 A. : 32.0 I? .K m '3 .o 30 .0 t gf-(H'S‘GQDM A) I. A n . A I' 0 7 F1»! aw)- HJ. . 9,4. .L 1o» , L», C? '. r. “,3 = (54510103 1- 310 ’L M uA u; 23-0 _’ '3 .o [c t (J. n ? aoodrml‘. 1‘ u h 1" 'r J... a- ; .,_ 9.: dc— : V} + 1,1 la, IL I 4 [NM PuL . 3c» : l .0 ' alsehx z a. lfo; ‘ 0.13% I? 1) Chapter 6, Problem 30 In Fig. 5-35,. two blocl-cs are connected over El pulley. The mass of block A is 13 kg and the coefficient of kinetic Friction between A and the incline is 0.26. Angle H of the incline is 48". Block A slides down the incline at constant speed. What is the mass of lolocl-a: fl? Frioo'onless. mas-s] pulley CA D a“ ’r ‘m‘t‘ l 0'6" ' . \ ‘4 ‘ ‘ 3 Al N '\. ‘4‘ L‘ ’ ‘ I A E ‘ _| {z . ~ Suu9 '1‘ . (K t O 0 <— ’ | U.‘ _ “' h ’ ‘ 5' M 6 = ‘9- ° ' \M, It“ ‘_ ' Maui ru. 1‘ . ‘ 'X. A I . ‘-LA'- A A. -k M j ‘ t , a, _ _ . '- . [A ~19 ‘II A (I ‘ _ ‘ a' A, ‘ C u; <\ . "'-' U: I _ I'M) , I , 340122! 192 ‘- ~— ‘4‘ \ In a— O ~ ~— 0 OPAL ._ l .l - M" I; I u \ \JOI‘ I 0k " 0 v‘ . . _ A : I’I A‘M ‘- opi'h‘a _ Chapter 6, Problem 32 A towr chest and its contents have a combined weight of W = 220 N. The coefficient of static friction between towr chest and floor #5 is 0.460. The child in Fig. 5-38 attempts to move the chest across the floor hv pulling on an attached rope. [a] If B is 46.0”, what is the magnitude of the force Fthat the child must exert on the rope to put the chest on the verge of moving? Determine [h] the value of E for which F is a minimum and [c] that minimum magnitude. 5' B““' 0 n '\ ‘\ . A "- Al 11 ..' ‘ \‘U ‘L l‘ . [‘4‘ ANN" 1 I v a t 0 ! POM 1‘ -L'/ vp-u.‘ “It .4 "\ l & H II I) u... l‘.‘u."A I : M W -— LA II L M .r ° ~f;n R 'L -+.. Hl’g, .l I! Chapter 16', Problem 20 GO _, In the figure, a hprizcntal fcrce F a ct magnitude 21.0 N is applied tc a 3.11 kg peel-s: as the heel-s: slides a distance d = 0.85 rn up a fricticnless ramp at angle 9 = 30". The back begins with zerc- kinetic energy. I|.I'|.lhat is its speed at the end at the displacement? 9/ v at" it. fit; w r . t "L J = {:4 A , 2 4:; A , ° 4‘— 1's :5 1- «V . - , ' r = O - ~l—ol~«l .r I‘ ' A 2 A. A r ,. , «J L a it Hi 3""‘H .1. A Add. 114 ' J [1 fl BIA“ A l‘ I. / l1 2; .1 ' . V I, ! Tu In” I A A ' ’4 A 4 ' I 3 2.“ I a u 1 MM) 603 by L”) A-.. I- . 4"" 1' —— 3 A "A ‘A 1 Lurk- a n L . 4 _. . : E.» a? '3 I; do.) > 4.} _ 0 = ° t A $3 N ?0° ‘-' l . 6‘40'418’? 6’ 9:31.119. Lao/ n—a A b : "R‘ 0 m I -: a '9’8' 1 A“ A A l‘x _ I‘nt‘L‘L I‘ 1‘ D II I II S m 7-“ ...
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