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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.) Wbatisafrcc 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»
folr1842“ 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 xaxis, 60 degrees from the
positive yaxis, and 45 degrees from the positive zaxis. Z when T5 :: teeth”? + (333 62ft Cm ,_ new“
: 400cm; r2001“ 1 team“; + “5% H ......... MlFﬂ"'w'ﬁﬂm"_"de—“nmm:_ ms + with x
F: 600 H) emmn‘emmennmmmmmnmmmn—mm—mwnnm manMM 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 xaxis.
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. tamrmnr.mu.mmmwwmwmhHammﬂwmimilmmhmmmmmmmm‘ PﬂGE 84 ‘4'“ m gm: «mmLea.
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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 Fall '08
 Troxel
 Force, pts, mm mm, mm mm pumm

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