Sample Test _1 solutions

Sample Test _1 solutions - 8231832888 28:51 815 28? 2115...

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Unformatted text preview: 8231832888 28:51 815 28? 2115 TRDXEL PflGE 81 at {y‘ {liccw"‘" dis ("17 WU FED TEST # 1, September 20, 2006 CE 180, Statics STUDENT PLEDGE: I, . have not given or received improper aid on this quiz INSTRUCTIONS: Read each problem carefully and think about the problems before you start to solve them. Show all your work neatly. A straight edge is not required. Clearly show your answers and use proper units. ~ an 1. (2 pts.) Wbat-isafrcc body diagram? A AIRSVM“ or J W its Suppm/B review“ no N WWW“ ‘9'“ “hm. obje Li I h 2. (2 pts.) What is a couple? What effect does it have? : ‘l‘LUO €83,681, mVfllmr W" {3% 1/ ram» fol-r1842“ 3. (2 pts.) What isafree vector? CUM W! pl QWWWAQ' m mm mm E’ howl “Scum. WWflg‘ Elm-"d" fl 4. (2 pts.) If you are going to find the moment of F about point A, you use a (F x r). I (r x F). o) ua(r x F). d) uan x r). “ n 0.2 rn I -‘ “WM” uwfiwmwmmmmmnmwwnmmhumm at F 5- (2 1315-) In the figure above, will the moment/about be larger about point 0 or about point A? Explain. F“ to an «two “2445 P'th VLL W. i?“ official: (5 la???“ scam seems we W‘W (pflubfif lb Tmiaj C3! BEKIEII'EEIEIEI 28:51 515 2‘3? ?115 TREIXEL PiliGE El? Weir (jet- ew c awe 6. (10 pts.) Express force F; (Magnitude = 400 lb) in Cartesian vector form. The angles shown are 60 degrees from the negative x-axis, 60 degrees from the positive y-axis, and 45 degrees from the positive z-axis. Z when T5 :: teeth”? + (333 62ft Cm ,_ new“ : 400cm; r2001“ 1- team“; + “5% H ......... Ml-Ffl"'w'fiflm"_"de—“-nmm:_ ms + with x F: 600 H) emmn‘emmennmmmmmnmmmn—mm—mwnnm man-MM 7. (20 pts.) The force acting on the man, caused by pulling on the anchor cord, is F = (40i + 20j — 5019151. If the length of the cord is 25 In, determine the coordinates of the anchor. QMT MRI? mw.1blnpmmuwmm~»Ilmnmrnmmmulwnmmmimmmmm r 1 F: 40" no" +4201 5 “’0er -‘ \ if: = 215' (401+ myrsoe.) = (H‘ixgs 7&5an \sfi‘bib 1"“ cane teammates cm. (ism 8231832888 28:52 515 28? 2115 TREIXEL WAGE 83 2. [DD 8. (30 pts.) If the tension in cable ED and EC i 106 ounds, What is the force_ in. H 3- cable EB? The coordinates of point E are (0,8, . wag“, “€03 fifth raj ’x “((8) 2.’ .1: Jq L114} manor w n, 5. mm mm pumm by humm hum HMI‘ Human mm. mm, Upw am» Few."wa M Fm» mom- G\m'_ I TED : T;— .'.' Mm 8231832888 28:52 815 28? 2115 TRDXEL \W 9. (30 pts.) The magnitude of force P is ling) It is parallel to the x-axis. a. What is the moment of force P about point B? QT, 13. What is the moment of force P about thqffiaafifsfi 0. Draw a couple using 20H forces at points A and B. tam-rmnr.mu.mmmwwmwmhHammflwmimilmmhmmmmmmmm‘ PflGE 84 ‘4'“ m gm: «mm-Lea. FM‘. Wig, ‘3»wa f,» g 1m? WWW?) it 1(a)? m HEW -- i "a ‘5 .... , ,a W O 1 ..\ 1 (WW ~[0-(*0Ce°3]¢\~ (cu—1oon WM 1%) mg, : 400130 (with = «m‘biG‘ 4‘50?” ...
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Sample Test _1 solutions - 8231832888 28:51 815 28? 2115...

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