ECS 221 Exam I

ECS 221 Exam I - ENGINEERING MECHANICS-STATICS E05221 FALL...

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Unformatted text preview: ENGINEERING MECHANICS-STATICS E05221 FALL 2011 EXAM 1 September 23, 2011 Name SvaT/fl/LJS piease print Signature SU Identification No. m Recitation instructor Recitation Day Problem #1 Problem #2 Problem #3 Problem #4 "ll—I—Iulnoan—u. TOTAL m PROBLEM ONE i) Find the rectangular components of the SON force parallel and pmpcndicular to the inclined plane AC. (Include directions!) ii) Find the rectangular components of the SON force parallel and pclpendicular to AB. (Include directions!) PROBLEM TWO a) Determine the force the person must exert to hold the weights (which are assumed known) in equilibrium. b) How much does this individual have to weigh in order to remain on the ground? 7”“ . t.»— Z 7Liie..:"i 9"“ ‘3‘ M7“) Lu). ' WV. '“" D r”: WL‘LJt / (Fm—~— Z- U'L Int—‘54 Ecujzanniaw' 72mm [—Jf F—i or»; we. / "(S WivHi‘wt-L, 3’? V\'D_‘ij M; Lotrf{{ kJ‘IMKM faiw’i'irw- @{w‘il g‘rgJiéIm-MM germ?" ~5— C) :5 N+--T*u) 0 Mia £2 T‘s-L) {3:3 “Aim Magnum L,J‘CLV 4*” Vilmaiw :m j «we “A. ‘3; J \ij : VJ;- "W1 2, fl b. PROBLEM THREE A weight W is supported by 5 cables. a. Find the tensions in each of the cables in terms of W. b. lfa cable fails under a tension of T*=10,000 lb find the maximum weight the structure can support. If the weight were to be gradually increased through this value which cable would fail first? $.11 L‘AWJFJHI‘F "' \‘ 6F .- j Z ‘l -—- "W .— ‘- .-——-—~ --—~ I v” f“ 5 "2:2: 7éo z—txflc> e> m me + leeii -cm lee J3 %C 60" #— ‘_,.._. \ ' <1 7 “‘” "m '1 ,3 ~ x“: xi; : \DB .2" “’- w firs (fl Elks) w o ’ k) + lac. 1 ‘3 3 fl... ,1“ flamJ?”‘/_.-L:7r_ _: “O '- )L€ lgr ; D K” . M Jib _ _LV ’4’; ’2: la: '- Jj Lu) "ff r“ m" -. 2% we %> it’<.dJ§—é : {CF *‘ J; W ' ._L-. ,5_"3 z + w LDJH-C’bic (.J b . " L57») “Tag;- Lax/let; 71¢ Wort Amgt ‘ m-X “J..— /9 3” IL Icé‘tirretW* / / WM: Hm 3’ hf"? (3317/: //> PROBLEM FOUR For the force system shown, determine: a) The resultant g of the forces in i, i, 3 form. b) The magnitude R of resultant B. ‘ e) The direction cosiues (angles) 6x, 6),, 62 for resultant E. f (I 51"“?ESE/U f,” n n vfl ita- Mw /\ >\ :: “Rf—5,4342% M / “” Jllz't 522+; L 5: «36243:» 37Sf+2zi "fl ’7 n (l "Le/“#249 L”J’é-?J +£3.92!“ ,u a «r _, 1”." fl 2?” 71*" L?" " “Seatl~5t\§j~+33.g t, ,u /Z : IE3]: fiéaz an”: + a *1 x?» “i "J‘éb (9 m (as M736 S W 3 K [29, a 34% r~ C9 '2: “:3 l l: /,. ,, j c S‘ v???“ ‘7”8 c3 ~I 3M3 a C94 5‘55” 3 "x‘ 34 ...
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ECS 221 Exam I - ENGINEERING MECHANICS-STATICS E05221 FALL...

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